Silver appeals capital murder conviction of Garda Horkan in Roscommon
Stephen Silver, a 46-year-old motorbike mechanic from Aughaward, Foxford, Co Mayo, shot acting Detective Garda Colm Horkan, a 49-year-old man, eleven times with the garda's own gun in Castlerea, Co Roscommon, just before midnight on 17 June 2020. Silver was charged with capital murder, pleading not guilty to murder and guilty to manslaughter by reason of diminished responsibility. After a hung jury in November 2022, a second trial at the Central Criminal Court in March 2023 returned a unanimous capital murder verdict, and Silver was sentenced to life imprisonment with a 40-year minimum term on 19 April 2023. Silver appealed his conviction to the Court of Appeal in March 2026, arguing the prosecution's psychiatric evidence contradicted the legal test for insanity, and the court reserved judgment.
- Reportednot reported
- Arrestednot reported
- Chargednot reported
- In court9 Mar
8 reports - Convicted15 Mar
10 reports - Sentenced19 Apr
4 reports
Key facts
consolidated from all reports- What happened
- Silver struck Horkan on the head with the gun and then shot him 11 times, some while Horkan was on the ground, until the gun was empty.
- Where
- The shooting took place in Castlerea, Co Roscommon.
- When
- The incident occurred just before midnight on 17 June 2020.
- Cause
- Horkan stopped his unmarked patrol car to speak to Silver after residents complained about erratic motorbike driving and loud music on a local housing estate.
- Weapon
- Silver used Horkan's own service firearm, which he took from its holster.
- Charges
- Silver pleaded not guilty to capital murder and guilty to manslaughter by reason of diminished responsibility.
- In court
- A first trial in November 2022 ended in a hung jury; a second trial at the Central Criminal Court before Ms Justice Tara Burns began in February 2023.
- A jury of seven men and five women returned a unanimous verdict of capital murder on 15 March 2023 after 8 hours and 39 minutes of deliberation.
- Silver appealed his conviction to the Court of Appeal in March 2026, arguing the prosecution's psychiatric evidence contradicted the legal test for insanity; the court reserved judgment.
- Sentence
- Silver was sentenced to life imprisonment with a 40-year minimum term at the Central Criminal Court on 19 April 2023.
- Other details
- Silver had a long history of bipolar affective disorder with approximately 17 psychiatric admissions, and the defence argued his responsibility was substantially diminished at the time of the shooting.
- Horkan was a serving acting detective in An Garda Síochána, on duty that day, and had been on duty since 2pm.
- The Horkan family called for a public inquiry in October 2026 following RTÉ Investigates revelations that the holster Horkan used was faulty and not fit for purpose.
276 statements extracted from the articles
- whatThe prosecution described the shooting as a deliberate action done with the intent of murder (longfordleader.ie)
- whatSilver had a seething resentment toward gardaí (longfordleader.ie)
- whatHorkan was shot dead with his own firearm nine hours after signing it out on 17 June 2020 (longfordleader.ie)
- whatSilver struck Horkan on the head at least once with the gun and then shot him ten times, some while on the ground (longfordleader.ie)
- whatSilver fired until the gun was empty (longfordleader.ie, irishtimes.com)
- whatSilver referenced the George Floyd shooting at the scene (longfordleader.ie)
- whatSilver disturbed residents in Knockroe estate by driving a motorbike loudly around the estate (longfordleader.ie)
- whatSilver struck Garda Horkan on the head at least once with the gun and then shot him 10 times, some while Horkan was on the ground. (irishtimes.com)
- whatThe prosecution believed the defence of diminished responsibility should be rejected. (irishtimes.com)
- whatSilver told Dr Brenda Wright he only pulled the trigger once, but evidence was given of the pull pressure required to discharge a shot. (irishtimes.com)
- whatSilver is 46 years old and lives in Aughavard, Foxford, Co Mayo. (thejournal.ie)
- whatIt was not in dispute that Garda Horkan was a serving member of An Garda Síochána and was on duty that day. (thejournal.ie)
- whatThe defence questioned what Garda Horkan was doing when he got out of an unmarked patrol car and whether he was acting lawfully. (thejournal.ie)
- whatBoth the defence expert and the prosecution expert agreed that Silver had bipolar affective disorder. (thejournal.ie)
- whatThe two experts were not in agreement that the disorder was operant at the time of the shooting. (thejournal.ie)
- whatSilver said he kept shooting until the gun had no ammunition left. (thejournal.ie)
- whatSilver and his friend James Coyne were walking towards the centre of Castlerea shortly before midnight on 17 June 2020. (rte.ie)
- whatThe two men had been driving a motorbike erratically around a local housing estate before the incident. (rte.ie)
- whatSilver had been heard shouting and roaring by neighbours who called gardaí. (rte.ie)
- whatDetective Garda Horkan had been on duty since 2pm and was driving an unmarked car with a garda issued firearm. (rte.ie)
- whatSilver claimed he did not recognise the driver as a garda because he was wearing a Tommy Hilfiger jacket. (rte.ie)
- whatSilver admitted shooting Garda Horkan and said he struck him with the butt of the gun as he fell to the ground. (rte.ie)
- whatGarda Horkan died from his injuries and had been shot 11 times. (rte.ie)
- whatThe defence argued Silver was suffering from a significant relapse of his long-standing bipolar affective disorder. (rte.ie)
- whatSilver had a history of mental illness going back 20 years and was admitted to hospital 17 times. (rte.ie)
- whatPsychiatrist Dr Brenda Wright concluded Silver's mental capacity was affected and his responsibility for the killing was diminished. (rte.ie)
- whatProfessor Kennedy found no positive evidence that Silver had suffered a relapse of his mental illness at the time of the shooting. (rte.ie)
- whatProsecuting counsel Michael Delaney said the shooting was a deliberate action done with the intent of murder. (rte.ie)
- whatSilver said the enormity of what he had done did not hit him until he was taken to the Central Mental Hospital. (rte.ie)
- whatSilver shot Garda Horkan 11 times with the garda's own gun. (irishtimes.com)
- whatHorkan was shot dead during a stop and check that should have been routine. (irishtimes.com)
- whatSilver is a 46-year-old motorbike mechanic from Aughaward, Foxford, Co Mayo. (irishtimes.com)
- whatSilver had earlier been driving a motorbike erratically around a local housing estate, shouting at residents. (irishtimes.com)
- whatDet Horkan was working alone from an unmarked patrol car on the night of the incident. (irishtimes.com)
- whatSilver suffered from bipolar affective disorder. (irishtimes.com)
- whatSilver is reported to be appealing his conviction. (irishmirror.ie)
- whatSilver told prison officers he was deranged when he shot Detective Garda Colm Horkan. (irishmirror.ie)
- whatSilver shot Horkan eleven times. (irishmirror.ie)
- whatSilver shot Garda Colm Horkan eleven times. (irishmirror.ie)
- whatThe murder victim was Garda Colm Horkan. (extra.ie)
- whatThe article reports a statement from the sister of murdered Garda Colm Horkan. (extra.ie)
- whatStephen Silver was sentenced to the mandatory 40-year sentence for capital murder. (irishmirror.ie)
- whatDetective Garda Colm Horkan was shot 11 times. (irishmirror.ie)
- whatThe headline refers to the murder of Detective Colm Horkan. (extra.ie)
- whatDetective Garda Colm Horkan was slain. (extra.ie)
- whatSilver has appealed his murder conviction. (rte.ie)
- whatSilver shot and murdered Detective Garda Colm Horkan. (rte.ie)
- whatStephen Silver fatally shot Garda Colm Horkan (irishtimes.com)
- whatHorkan was shot 11 times with his own gun (irishtimes.com)
- whatHorkan was an acting detective (irishtimes.com)
- whatSilver is a 49-year-old motorbike mechanic from Aughaward, Foxford, Co Mayo (irishtimes.com)
- whatSilver has a long history of bipolar affective disorder (irishtimes.com)
- whatSilver was hospitalised on psychiatric wards on numerous occasions (irishtimes.com)
- whatFollowing each admission Silver would stop taking his medication causing relapse (irishtimes.com)
- whatSilver shot and murdered Garda Colm Horkan after taking the garda's own gun from its holster. (irishmirror.ie)
- whatSilver is 49, a motorbike mechanic from Aughaward, Foxford, Co Mayo. (irishmirror.ie)
- whatGda Horkan died having been shot eleven times with his own gun. (irishmirror.ie)
- whatSilver had a long history of bipolar affective disorder requiring hospitalisation on psychiatric wards on numerous occasions. (irishmirror.ie)
- whatFollowing each admission, Silver would stop taking his medication, causing him to relapse and be readmitted. (irishmirror.ie)
- whatOn the night of his death, Horkan responded to complaints from residents after Silver had started blaring music while driving his motorcycle dangerously and burning out his back tyre. (irishmirror.ie)
- whatCCTV evidence suggested Silver spat in the garda car window, prompting Horkan to get out of the car. (irishmirror.ie)
- whatDetective Garda Colm Horkan was shot dead in June 2020. (rte.ie)
- whatStephen Silver murdered Detective Horkan. (rte.ie)
- whatStephen Silver took the garda's gun from its holster before shooting him. (rte.ie)
- whatThe Horkan family called for a public inquiry. (rte.ie)
- whatProtected disclosers stated the holster was faulty and not fit for purpose. (rte.ie)
- whatThe family said revelations in a recent RTÉ Investigates programme heightened their concerns. (rte.ie)
- whatColm Horkan was aged 49 when he was murdered while on duty in 2020 (thejournal.ie)
- whatHorkan was shot several times with his own gun on 17 June 2020 in Castlerea, Co Roscommon (thejournal.ie)
- whatSteven Silver of Aughavard, Foxford, Co Mayo was found guilty of Horkan's murder in 2023 (thejournal.ie)
- whatConcerns have been raised in the Dáil that Horkan had allegedly been issued with a defective holster (thejournal.ie)
- whatThe Horkan family is seeking a public inquiry into the circumstances of Horkan's death (thejournal.ie)
- whereHorkan stopped his car to speak to Silver and James Coyne as they were walking towards the centre of Castlerea just before midnight. (irishtimes.com)
- whereHorkan was from Charlestown, Co Mayo. (irishtimes.com)
- whereSilver is from Aughaward, Foxford, Co Mayo. (irishtimes.com)
- whereThe Horkan family is from Charlestown, Co Mayo. (irishtimes.com)
- whereThe killing took place in Castlerea, Co Roscommon. (irishmirror.ie)
- whereThe sentence was passed at the Central Criminal Court. (irishmirror.ie)
- whereHorkan was shot dead in Castlerea, Co Roscommon. (irishtimes.com)
- whereThe shooting took place in Castlerea, Co Roscommon, in 2020. (irishmirror.ie)
- whereThe shooting took place in Castlerea, Co Roscommon. (rte.ie, irishtimes.com, irishmirror.ie)
- whereHe was shot dead in Castlerea, Co Roscommon. (rte.ie)
- whenHorkan signed out his firearm on the afternoon of 17 June 2020 and was shot dead with the same gun nine hours later. (irishtimes.com, irishmirror.ie, dublinlive.ie)
- whenHorkan had been on duty for about 10 hours on 17 June 2020 when the incident occurred. (irishtimes.com)
- whenDet Horkan stopped his vehicle in Castlerea just before midnight to speak to Silver about his erratic motorbike driving. (irishtimes.com)
- whenThe killing took place in June 2020. (irishmirror.ie)
- whenSilver will be aged 74 when he can first be considered for release by a parole board. (irishmirror.ie)
- whenThe shooting happened on 17 June 2020. (irishtimes.com)
- whenThe sentencing hearing was held on a Wednesday. (irishtimes.com)
- whenGarda Horkan was shot on 17 June 2020. (rte.ie)
- whenThe shooting occurred on 17 June 2020 (irishtimes.com)
- whenThe murder took place on 17 June 2020. (rte.ie)
- causeGardaí responded to complaints about loud music and dangerous driving by Silver on a Castlerea housing estate. (rte.ie)
- weaponSilver shot Garda Horkan 11 times with his own gun. (irishmirror.ie)
- weaponSilver took Horkan's gun and shot him. (irishmirror.ie)
- weaponHorkan was shot with the garda's service gun. (irishmirror.ie)
- weaponSilver shot Horkan eleven times with his own gun. (irishtimes.com)
- weaponSilver used the garda's own gun, which he took from its holster. (rte.ie)
- weaponStephen Silver used the detective's official firearm. (rte.ie)
- investigationThe headline says a whistleblower raised alarm over Garda gun holsters. (extra.ie)
- investigationSilver's lawyers argued at trial that his responsibility was substantially diminished by mental illness. (rte.ie)
- chargeSilver pleaded not guilty to murder and guilty to manslaughter. (irishtimes.com)
- chargeSilver has pleaded not guilty to the murder of Garda Horkan knowing or being reckless as to whether he was a member of An Garda Síochána acting in accordance with his duty at Castlerea, Co Roscommon on 17 June 2020. (thejournal.ie)
- chargeSilver has pleaded guilty to manslaughter. (thejournal.ie)
- chargeSilver pleaded not guilty to murder knowing or being reckless as to whether Horkan was a Garda acting in accordance with his duty (irishtimes.com, dublinlive.ie)
- chargeSilver pleaded not guilty to the murder of Garda Horkan knowing or being reckless as to whether he was a member of An Garda Síochána acting in accordance with his duty at Castlerea, Co Roscommon on 17 June 2020. (thejournal.ie, irishtimes.com)
- chargeSilver pleaded guilty to manslaughter. (thejournal.ie, irishtimes.com, dublinlive.ie)
- chargeSilver pleaded not guilty to the murder of Det Garda Horkan knowing or being reckless as to whether he was a member of An Garda Síochána acting in accordance with his duty. (irishmirror.ie, irishtimes.com)
- chargeSilver pleaded guilty to manslaughter by reason of diminished responsibility. (irishmirror.ie)
- chargeSilver pleaded not guilty to murder but guilty to manslaughter by reason of diminished responsibility. (irishtimes.com)
- chargeSilver pleaded guilty to manslaughter at Castlerea, Co Roscommon on 17 June 2020. (irishtimes.com, irishmirror.ie)
- chargeSilver had pleaded guilty to manslaughter but denied murder. (irishtimes.com)
- chargeSilver had pleaded guilty to manslaughter but not guilty of murder. (irishmirror.ie)
- chargeSilver had pleaded not guilty to the murder of Horkan. (irishmirror.ie)
- chargeSilver had earlier pleaded guilty to manslaughter. (irishmirror.ie)
- chargeSilver pleaded not guilty to the murder of Det Gda Horkan knowing or being reckless as to whether he was a member of An Garda Siochana acting in the course of his duty. (irishmirror.ie)
- courtThe trial is before Ms Justice Tara Burns with a jury of seven men and five women (longfordleader.ie)
- courtThe defence closing statement is due on 10 March 2023 (longfordleader.ie)
- courtThe trial continues before Ms Justice Tara Burns and a jury of seven men and five women on Friday, with the defence due to deliver a closing statement. (irishtimes.com)
- courtThe jury had to decide on the balance of probabilities whether Silver was suffering from a mental disorder at the time and whether it diminished his responsibility. (thejournal.ie)
- courtThe trial continues on Monday when Ms Justice Tara Burns will give her charge to the jury. (thejournal.ie)
- courtThe defence contended Silver was in a relapse of bipolar affective disorder at the time of the shooting (irishtimes.com)
- courtThe defence said the shooting was not a targeted attack but a chance encounter (irishtimes.com)
- courtProf Kennedy argued Silver had contrived a performance to get away with a serious crime (irishtimes.com)
- courtThe jury had to decide on the balance of probabilities whether Silver was suffering from a mental disorder and whether it diminished his responsibility (irishtimes.com)
- courtThe trial continues with Ms Justice Tara Burns to give her charge to the jury (irishtimes.com)
- courtThe jury at the Central Criminal Court began deliberations in the trial of Stephen Silver. (thejournal.ie)
- courtThe jury consisted of seven men and five women. (thejournal.ie)
- courtThe possible verdicts are capital murder, murder simpliciter, or manslaughter by diminished responsibility or self-defence. (thejournal.ie)
- courtA verdict of not guilty is not open to the jury because Silver entered a plea to manslaughter. (thejournal.ie)
- courtIn the defence of diminished responsibility, the burden of proof rests on the defence rather than the prosecution. (thejournal.ie)
- courtThe defence made formal admissions that Silver caused the death of Garda Horkan and the killing was an unlawful act. (thejournal.ie)
- courtSelf-defence cannot arise in capital murder and can only arise in murder simpliciter. (thejournal.ie)
- courtThe jury retired to consider their decision at 3.40pm and will continue deliberations the following day. (thejournal.ie)
- courtThe judge stated she can only accept a unanimous verdict agreed upon by all 12 jurors. (thejournal.ie)
- courtThe jury will continue deliberations for a third day on Wednesday. (irishtimes.com)
- courtThe jury has spent a total of five hours and three minutes deliberating so far. (irishtimes.com)
- courtThe jury asked Ms Justice Tara Burns for clarification on the term recklessness before resuming deliberations. (irishtimes.com)
- courtThe jury panel consists of seven men and five women. (irishtimes.com)
- courtPossible verdicts include capital murder, murder simpliciter, or manslaughter due to diminished responsibility or self-defence. (irishtimes.com)
- courtA verdict of not guilty is not open to the jury because Silver entered a plea to the charge of manslaughter. (irishtimes.com)
- courtThe jury was asked to consider whether Silver was suffering from a relapse of his mental illness and whether this substantially reduced his responsibility. (irishtimes.com)
- courtProfessor Kennedy said Silver maintained a heightened emotional state and was at times angry and self-pitying during garda interviews. (irishtimes.com)
- courtThe accused expressed no regret or sympathy for the deceased and appeared to show poor social judgement, expecting to be released without charge. (irishtimes.com)
- courtThe jury reached a unanimous verdict of guilty of capital murder. (rte.ie)
- courtThe jury deliberated for almost nine hours before reaching the verdict. (rte.ie)
- courtSilver had previously gone on trial for murder but the jury could not agree on a verdict. (rte.ie)
- courtSilver gave evidence in his own defence at the trial. (rte.ie)
- courtSilver will be sentenced on 19 April. (rte.ie)
- courtStephen Silver was found guilty of capital murder of Garda Colm Horkan. (extra.ie)
- courtThe jury of seven men and five women deliberated for 8 hours and 39 minutes before returning the verdict to Ms Justice Tara Burns. (irishmirror.ie)
- courtThe verdict was reached after two trials at the Central Criminal Court. (irishmirror.ie)
- courtMs Justice Burns thanked the jury and excused them from jury service for the rest of their lives. (irishmirror.ie)
- courtA jury at the Central Criminal Court found Silver guilty of capital murder on 15 March 2023. (irishtimes.com)
- courtSilver was found guilty of capital murder at the Central Criminal Court. (irishtimes.com)
- courtThe jury of seven men and five women deliberated for 8 hours and 39 minutes before returning a unanimous verdict. (irishtimes.com)
- courtA previous jury in November 2022 spent just under nine hours over three days but could not resolve its disagreement. (irishtimes.com)
- courtSilver is to be sentenced on 19 April 2023. (irishtimes.com)
- courtMs Justice Tara Burns told the jury they were exempt from jury service for the rest of their lives. (irishtimes.com)
- courtSilver was convicted of capital murder, which relates to the murder of Garda members or prison officers in the line of duty. (irishtimes.com)
- courtA jury at the Central Criminal Court returned a unanimous verdict of capital murder against Stephen Silver. (irishtimes.com)
- courtThe jury of seven men and five women deliberated for a total of eight hours and 39 minutes. (irishtimes.com)
- courtA previous jury in November failed to agree a verdict, resulting in a retrial. (irishtimes.com)
- courtMs Justice Tara Burns presided at the Central Criminal Court. (irishtimes.com)
- courtSilver was found guilty of capital murder by a jury at the Central Criminal Court in the week before 20 March 2023. (dublinlive.ie)
- courtThe case went through two trials at the Central Criminal Court before a guilty verdict was reached. (dublinlive.ie)
- courtIn November 2022, a jury deliberated over three days and could not resolve their disagreement, having been given the option of a majority verdict. (dublinlive.ie)
- courtSilver was found guilty of capital murder by a jury at the Central Criminal Court. (irishmirror.ie)
- courtThe jury of seven men and five women deliberated for 8 hours and 39 minutes before returning the verdict. (irishmirror.ie)
- courtA previous jury in November 2022 was unable to reach a verdict after just under nine hours over three days. (irishmirror.ie)
- courtMs Justice Burns told the jury they were exempt from jury service for the rest of their lives. (irishmirror.ie)
- courtA jury in the first trial failed to reach a verdict, and Silver was convicted at the retrial. (irishmirror.ie)
- courtA jury found Silver guilty of capital murder after two trials. (irishmirror.ie)
- courtThe jury rejected Silver's defences and found him guilty of murdering Horkan. (irishmirror.ie)
- courtThe judge said she had no discretion because of the jury's verdict. (irishmirror.ie)
- courtThe trial judge said she had no discretion but to impose the maximum sentence for murder. (irishtimes.com)
- courtSilver had pleaded not guilty to the murder. (irishtimes.com)
- courtAfter two trials, a jury found Silver guilty of capital murder. (irishtimes.com)
- courtProsecution counsel read out victim impact statements from the Horkan family. (irishtimes.com)
- courtSilver was found guilty of capital murder over a month before this report. (irishmirror.ie)
- courtSilver intends to appeal the conviction. (irishmirror.ie)
- courtSilver's lawyers say the psychiatric evidence was contradicted by the prosecution expert, and the appeal argues this contradicted the legal test for insanity. (rte.ie)
- courtSilver testified that he believed the garda was trying to kill him. (rte.ie)
- courtThe Court of Appeal reserved its judgment. (rte.ie)
- courtSilver pleaded not guilty to the murder of Horkan (irishtimes.com)
- courtThe defence argued diminished responsibility under the Criminal Law (Insanity) Act 2006 (irishtimes.com)
- courtDr Brenda Wright said Silver was suffering a relapse of bipolar disorder that contributed significantly to his actions (irishtimes.com)
- courtProf Harry Kennedy said Silver showed functioning mental capacity by carrying out purposeful actions with specific intent (irishtimes.com)
- courtKennedy cited Silver's ability to take control of the gun, pull the trigger, stand back, and point and aim at the victim's trunk (irishtimes.com)
- courtThe appeal was heard before Judges John Edwards, Patrick McCarthy and Isobel Kennedy (irishtimes.com)
- courtThe Court of Appeal reserved judgment (irishtimes.com)
- courtSilver appealed his conviction claiming the State's psychiatric evidence contradicted the legal test for insanity. (irishmirror.ie)
- courtSilver's lawyers argued his responsibility was substantially diminished by his mental illness and he qualified for a manslaughter verdict under the Criminal Law (Insanity) Act 2006. (irishmirror.ie)
- courtConsultant psychiatrist Dr Brenda Wright said Silver was suffering a relapse of bipolar disorder which contributed significantly to his actions. (irishmirror.ie)
- courtProfessor Harry Kennedy, called by the prosecution, said Silver showed a functioning mental capacity by carrying out purposeful actions with specific intent. (irishmirror.ie)
- courtKennedy cited Silver's ability to take control of the gun, pull the trigger, stand back, support the gun in both hands, and point and aim at the victim's trunk as evidence of functioning mental capacity. (irishmirror.ie)
- courtDominic McGinn SC argued that Professor Kennedy's evidence contradicted the legal test for insanity under the Act. (irishmirror.ie)
- courtMichael Delaney SC for the DPP said the trial judge's charge had been entirely appropriate. (irishmirror.ie)
- courtMr Justice John Edwards, presiding with Mr Justice Patrick McCarthy and Ms Justice Isobel Kennedy, reserved judgment. (irishmirror.ie)
- sentenceSilver faces the mandatory minimum sentence of 40 years in prison for capital murder. (irishmirror.ie)
- sentenceSilver was due to be sentenced on 19 April 2023. (irishtimes.com)
- sentenceSilver faces a minimum sentence of 40 years in prison. (irishtimes.com)
- sentenceCapital murder carries a 40-year mandatory sentence, but Silver will serve 30 years due to a 2013 Supreme Court ruling on automatic remission. (irishtimes.com)
- sentenceSilver will be sentenced on 19 April 2023 to the mandatory 40-year term for capital murder. (irishtimes.com)
- sentenceDue to a 2013 Supreme Court ruling, Silver is entitled to automatic remission of 25 per cent, reducing his sentence to 30 years. (irishtimes.com)
- sentenceIf of good behaviour, the remission would increase to a third, meaning he would be freed after just over 26 and a half years. (irishtimes.com)
- sentenceSilver has been in custody since the murder and his sentence will be backdated to June 2020. (irishtimes.com)
- sentenceSilver faces a mandatory minimum sentence of 40 years. (dublinlive.ie, irishmirror.ie)
- sentenceSilver was due to be sentenced to the mandatory 40 years for capital murder on 19 April 2023. (irishmirror.ie)
- sentenceSilver was jailed for life with a minimum term of 40 years. (irishmirror.ie)
- sentenceThe judge specified that Silver must serve a minimum of 40 years in prison. (irishmirror.ie)
- sentenceStephen Silver was sentenced to life imprisonment. (extra.ie)
- sentenceSilver has been given a mandatory life sentence for the capital murder of Garda Colm Horkan. (irishtimes.com)
- sentenceSilver will serve a minimum of 40 years. (irishtimes.com)
- sentenceWith ordinary remission, Silver can apply for parole after 30 years. (irishtimes.com)
- sentenceWith remission, Silver will serve between 26 and a half and 30 years. (irishmirror.ie)
- sentenceIn April 2023 Silver was jailed for life with a minimum of 40 years to be served. (rte.ie)
- sentenceSilver was jailed for life with a minimum of 40 years in April 2023 (irishtimes.com)
- sentenceIn April 2023, Ms Justice Tara Burns jailed Silver for life with a minimum time to be served of 40 years. (irishmirror.ie)
- otherMcGinn argued the natural conclusion was that Silver was in a relapse of his bipolar affective disorder at the time of the shooting. (thejournal.ie)
- otherSilver had only one previous conviction, for driving without insurance. (thejournal.ie)
- otherMcGinn said a relapse could have been caused by the stress of his marriage breaking up, moving into the shed where he worked, or the stress of his business during Covid. (thejournal.ie)
- otherGarda Commissioner Drew Harris said Horkan's death reinforces the dangers and uncertainty of garda work. (rte.ie)
- otherMinister for Justice Simon Harris said Horkan exemplified the courage and dedication of An Garda Síochána. (rte.ie)
- otherSilver had about 17 admissions to psychiatric hospitals over the years. (irishtimes.com)
- otherSilver was prescribed Olanzapine after his last admission but stopped taking it within days. (irishtimes.com)
- otherSilver's first trial on the murder charge ended in a hung jury. (irishtimes.com)
- otherSilver's second trial began in February 2023. (irishtimes.com)
- otherGarda Horkan was a single man who lived in Charlestown, Co Mayo with his father at the time of his death. (irishtimes.com)
- otherHorkan had spent almost 25 years as a garda, having graduated on 28 September 1995. (irishtimes.com)
- otherIn 2020 Horkan had been directed to carry out the duties of a detective and was authorised to use a firearm and wear plain clothes during Covid-19. (irishtimes.com)
- otherSilver was a motorbike mechanic who had trained with FAS in Galway. (irishtimes.com)
- otherSilver was married for 13 years but left the family home in February 2020, four months before the shooting. (irishtimes.com)
- otherOn 16 June Silver spoke by phone to his sister Marian Bruen, who recognised signs of a psychiatric episode. (irishtimes.com)
- otherSilver spoke to bus driver Derek Mannion in Castlerea, who showed him a video of an armed garda raid on James Coyne's home in Knockroe. (irishtimes.com)
- otherSilver had about €300 in his bank account at the time. (irishtimes.com)
- otherSilver grew up in Granlahan, about ten miles from Castlerea, and had one younger sister, Marian. (irishtimes.com)
- otherSilver's father was an alcoholic. (irishtimes.com)
- otherSilver stopped using cannabis about 13 years ago after hitting a friend for no reason. (irishtimes.com)
- otherSilver took the stand in his defence and apologised to the Horkan family. (irishtimes.com)
- otherSilver is 46, a motorbike mechanic from Aughaward, Foxford, Co Mayo. (irishtimes.com)
- otherHorkan was the fourth member of his 1994 class from Garda College, Templemore, Co Tipperary, killed on duty. (irishtimes.com)
- otherGarda Ambrose Fogarty and Garda Eoin Fitzgerald, classmates of Horkan, died in road traffic crashes in 1999 and 1998. (irishtimes.com)
- otherSilver was wanted for no crime and it was highly unlikely he would have been arrested that night. (irishtimes.com)
- otherHorkan won a Connacht Senior Club Football Championship in 2001 with Charlestown Sarsfields and lined out for the Mayo U21s. (irishtimes.com)
- otherHorkan left Charlestown for the Garda Training College in his mid-20s in 1995. (irishtimes.com)
- otherHorkan arrived in Castlerea in January 1999 and served there for more than a decade before later postings. (irishtimes.com)
- otherGarda Deputy Commissioner Shawna Coxon said the death reinforces the dangers of the work every garda faces. (irishtimes.com)
- otherA close friend of murdered Garda Colm Horkan recalled listening to the 'horrific' evidence. (extra.ie)
- otherSources say Silver has become calmer and expressed remorse for his actions. (dublinlive.ie)
- otherSilver is largely confined to his cell for up to 23 hours a day. (dublinlive.ie, irishmirror.ie)
- otherSilver is only let out of his cell for meals and psychological assessment. (dublinlive.ie, irishmirror.ie)
- otherSilver is awaiting sentencing after his conviction. (dublinlive.ie)
- otherSilver is a motorbike mechanic from Aughaward, Foxford, Co Mayo. (dublinlive.ie, irishmirror.ie)
- otherThe main issue in the trial was Silver's state of mind at the time of the shooting. (dublinlive.ie)
- otherSilver said he kept shooting until the gun ran out of ammunition. (dublinlive.ie)
- otherSilver said he kept shooting until the gun finished and there was no ammunition left. (irishmirror.ie)
- otherSilver is being held in the special psychiatric unit of Mountjoy Prison while awaiting sentencing. (irishmirror.ie)
- otherSilver says he remembers little or nothing about the incident. (irishmirror.ie)
- otherSilver has a history of bi-polar disorder. (irishmirror.ie)
- otherHorkan was a well-regarded garda with 25 years' service and no disciplinary issues. (irishmirror.ie)
- otherThe judge said Silver had stopped taking medication for his bipolar affective disorder when he shot Horkan. (irishmirror.ie)
- otherSilver had a long history of mental illness and had failed to keep up with his treatment programme. (irishtimes.com)
- otherSilver's handwritten statement said he regretted what he did. (irishtimes.com)
- otherThe sister says the best part of her died the night Garda Horkan was killed. (extra.ie)
- otherThe Irish Prison Service has no plans to move Silver from Mountjoy. (irishmirror.ie)
- otherA prison source described Silver as a model prisoner. (irishmirror.ie)
- otherSilver is detained in a special unit with several other inmates who have known psychiatric issues. (irishmirror.ie)
- otherThe jury did not accept that Silver was insane at the time of the shooting. (irishmirror.ie)
- otherGarda Horkan's family said the state must ensure Silver serves the full 40-year sentence with no early release. (irishmirror.ie)
- otherThe family of murdered Detective Colm Horkan is demanding answers from the Garda Commissioner. (extra.ie)
- otherThe family of Detective Garda Colm Horkan met with a whistleblower. (extra.ie)
- otherLabour's Alan Kelly welcomed the family's statement. (rte.ie)
- otherThe current Minister for Justice is Jim O'Callaghan. (rte.ie)
- otherHelen McEntee was the predecessor Minister for Justice. (rte.ie)
- otherGarda Commissioner Justin Kelly said he is meeting the Horkan family next month to discuss the matters (thejournal.ie)
The reporting
newest first- 29 Oct2026Garda Commissioner to meet family of murdered Detective Garda Colm Horkan
Garda Commissioner Justin Kelly said he will meet the Horkan family next month to discuss the defective holster concerns and the family's call for a public inquiry, saying it is 'probably not appropriate to discuss them publicly now.'
victim, Colm Horkan, 49, male, irish (judged from name)Colm Horkanconvicted, Steven Silver, male, named, irish (judged from name)Steven Silver - 15 Oct2026Family of murdered Garda Horkan call for public inquiry
Family calls for independent public inquiry following RTÉ Investigates revelations about a faulty holster and the treatment of protected disclosers; Labour TD Alan Kelly welcomes the statement and says the Minister for Justice has questions to answer.
victim, Colm Horkan, male, irish (judged from name)Colm Horkanconvicted, Stephen Silver, male, named, irish (judged from name)Stephen Silver - 20 Mar2026Garda killer Stephen Silver launches bid for freedom
Reports on Silver's Court of Appeal hearing where his counsel argued the prosecution's psychiatric evidence contradicted the legal test for insanity under the Criminal Law (Insanity) Act 2006; the court reserved judgment.
victim, Colm Horkan, male, irish (judged from name)Colm Horkanconvicted, Stephen Silver, 49, male, named, irish (judged from name)Stephen Silver - 19 Mar2026Man convicted of murdering Garda Colm Horkan appeals verdict
Appeal hearing at the Court of Appeal on 19 March 2026; Judges Edwards, McCarthy and Kennedy reserved judgment.
convicted, Stephen Silver, 49, male, named, irish (judged from name)Stephen Silvervictim, Colm Horkan, male, irish (judged from name)Colm Horkan - 19 Mar2026Silver appeals conviction for murder of Garda Colm Horkan
Reports an appeal hearing against the murder conviction of Stephen Silver, sentenced in April 2023 to life imprisonment with a minimum of 40 years. The Court of Appeal reserved judgment. Adds the grounds of appeal and trial background.
victim, Colm Horkan, male, irish (judged from name)Colm Horkanconvicted, Stephen Silver, 49, male, named, irish (judged from name)Stephen Silver - 22 Jun2025Family of slain Detective Garda Colm Horkan meet with whistleblower
Reports that the Horkan family met with a whistleblower. The body contains no details beyond the headline.
victim, Colm Horkan, irish (judged from name)Colm Horkan - 5 Feb2024Heartbroken Family Of Murdered Detective Colm Horkan Demand Answers From Garda Commissioner
The article adds only that the family is demanding answers from the Garda Commissioner. The body is search-widget template code with no case details.
victim, Colm Horkan, irish (judged from name)Colm Horkan - 5 Nov2023Whistleblower Raised Alarm Over Garda Gun Holsters Detective Colm Horkan Murder
The article body is website template code with no story text. The only substantive content is the headline, which links a whistleblower's alarm about Garda gun holsters to the Horkan murder. It adds no new facts about the case.
victim, Colm Horkan, irish (judged from name)Colm Horkan - 20 Apr2023Cop killer Stephen Silver won't be moved from Mountjoy as is 'behaving himself'
Reports that Silver will stay in Mountjoy, is held in a special psychiatric unit, and intends to appeal, and that the family wants him to serve the full sentence with no early release.
victim, Colm Horkan, irish (judged from name)Colm Horkanconvicted, Stephen Silver, named, irish (judged from name)Stephen Silver - 19 Apr2023'Best Part Of Me Died That Night', Says Sister Of Murdered Garda Colm Horkan
The article supplies only a headline, quoting the sister of Garda Colm Horkan. The page body is template code with no article text, so no location, court or investigation details can be taken from it.
victim, Colm Horkan, irish (judged from name)Colm Horkan - 19 Apr2023‘I miss him terribly,’ Garda Colm Horkan’s father says as Stephen Silver sentenced to life for his murder
Reports the sentencing: mandatory life sentence with a minimum of 40 years, parole eligibility after 30 years with remission, victim impact statements read in court, and the family's reaction.
victim, Colm Horkan, 49, male, irish (judged from name)Colm Horkanconvicted, Stephen Silver, 46, male, named, irish (judged from name)Stephen Silver - 19 Apr2023Stephen Silver Sentenced To Life For Murder Of Garda Colm Horkan
Reports that Stephen Silver was sentenced to life for the murder of Garda Colm Horkan.
convicted, Stephen Silver, named, irish (judged from name)Stephen Silvervictim, Colm Horkan, irish (judged from name)Colm Horkan - 19 Apr2023Garda killer Stephen Silver sentenced to life in prison for Colm Horkan murder
Reports the sentence: life imprisonment with a minimum of 40 years, passed at the Central Criminal Court on 19 April 2023, and the jury's guilty verdict on capital murder.
victim, Colm Horkan, 49, male, irish (judged from name)Colm Horkanconvicted, Stephen Silver, 46, male, named, irish (judged from name)Stephen Silver - 13 Apr2023Garda killer Stephen Silver to appeal conviction for murder of Colm Horkan
Reports that Silver intends to appeal his conviction, that he says he was deranged when the shooting happened, and that sentencing was due on 19 April 2023. Gives the incident as June 2020 without a exact date.
victim, Colm Horkan, 49, male, irish (judged from name)Colm Horkanconvicted, Stephen Silver, 46, male, named, irish (judged from name)Stephen Silver - 20 Mar2023Garda killer Stephen Silver 'full of remorse' in specialised unit of prison
Reports on Silver's post-conviction conditions in Mountjoy Prison, details of the jury deliberation (8 hours 39 minutes), the previous hung jury in November 2022, and trial evidence including conflicting psychiatric testimony on Silver's mental state.
victim, Colm Horkan, male, irish (judged from name)Colm Horkanaccused, Stephen Silver, 46, male, named, irish (judged from name)Stephen Silver - 20 Mar2023Garda killer 'expressed remorse' as he's housed in separate Mountjoy unit
Reports on Silver's post-conviction detention in a separate Mountjoy unit, his expressed remorse, details of the two trials including the hung jury in November 2022, the jury's deliberation, and conflicting psychiatric expert evidence on his state of mind at the time of the shooting.
victim, Colm Horkan, male, irish (judged from name)Colm Horkanconvicted, Stephen Silver, 46, male, named, irish (judged from name)Stephen Silver - 19 Mar2023Close Friend Of Murdered Garda Colm Horkan Recalls Listening To 'Horrific' Evidence
A close friend of the victim recalled listening to the 'horrific' evidence in the case.
victim, Colm HorkanColm Horkan - 16 Mar2023Emotional scenes as Stephen Silver convicted of capital murder of Det Colm Horkan
Reports the jury's unanimous capital murder verdict, details of the trial including expert psychiatric evidence, the sentencing date of 19 April 2023, and the mandatory 40-year term reduced to 30 years by remission. Notes that a previous jury in November failed to agree, leading to a retrial.
victim, Colm Horkan, male, irish (judged from name)Colm Horkanconvicted, Stephen Silver, 46, male, named, irish (judged from name)Stephen Silver - 15 Mar2023‘Gentleman’ Garda Colm Horkan fourth member of his class killed on duty
Reports the capital murder conviction and the 40-year mandatory sentence (30 years to serve under a 2013 Supreme Court ruling). Provides extensive background on Horkan's life, career and the circumstances of the shooting, including tributes from his family, Garda Deputy Commissioner Shawna Coxon, Garda Commissioner Drew Harris, and Minister for Justice Simon Harris.
victim, Colm Horkan, male, irish (judged from name)Colm Horkansuspect, Stephen Silver, 46, male, named, irish (judged from name)Stephen Silver - 15 Mar2023Stephen Silver found guilty of capital murder of Garda Colm Horkan
Reports the guilty verdict returned by the jury after 8 hours 39 minutes of deliberation; a previous jury in November 2022 had been unable to resolve its disagreement. Silver faces a minimum 40-year sentence and is to be sentenced on 19 April 2023.
victim, Colm Horkan, male, irish (judged from name)Colm Horkanconvicted, Stephen Silver, 46, male, named, irish (judged from name)Stephen Silver - 15 Mar2023Stephen Silver: The full story of his trial for the murder of Garda Colm Horkan
Detailed account of Silver's second trial, including his mental health history (schizo affective disorder, bipolar disorder, ~17 psychiatric admissions), the events of 17 June 2020 (meeting an Australian woman, visiting James Coyne in Knockroe, stopping at Castlerea Garda Station), and the jury's guilty verdict on capital murder. Notes the first trial in 2022 ended in a hung jury.
victim, Colm Horkan, male, irish (judged from name)Colm Horkanaccused, Stephen Silver, 46, male, named, irish (judged from name)Stephen Silver - 15 Mar2023Stephen Silver found guilty of capital murder of Garda Colm Horkan
Reports the jury verdict finding Silver guilty of capital murder after 8 hours 39 minutes of deliberation before Ms Justice Tara Burns. Details trial evidence including Silver's account of the struggle over the gun and conflicting psychiatric expert testimony on his mental state.
victim, Colm Horkan, male, irish (judged from name)Colm Horkanaccused, Stephen Silver, 46, male, named, irish (judged from name)Stephen Silver - 15 Mar2023Stephen Silver Found Guilty Of Capital Murder Of Garda Colm Horkan
Reports the guilty verdict in the capital murder trial of Stephen Silver for the shooting of Garda Colm Horkan.
victim, Colm Horkan, male, irish (judged from name)Colm Horkanconvicted, Stephen Silver, male, named, irish (judged from name)Stephen Silver - 15 Mar2023Silver found guilty of capital murder of Garda Horkan
Reports the jury's unanimous guilty verdict delivered on 15 March 2023 after almost nine hours of deliberation, details of the trial evidence including competing psychiatric testimony, and reactions from both families and officials.
victim, Colm Horkan, male, irish (judged from name)Colm Horkanconvicted, Stephen Silver, 46, male, named, irish (judged from name)Stephen Silver - 14 Mar2023Jury in Stephen Silver murder trial to return for third day of deliberations on Wednesday
Reports the jury's third day of deliberations, the judge's directions on available verdicts, and the competing psychiatric expert evidence from Dr Brenda Wright (defence) and Professor Harry Kennedy (prosecution) on whether Silver was in a relapse of bipolar affective disorder at the time of the shooting.
victim, Colm Horkan, male, irish (judged from name)Colm Horkanaccused, Stephen Silver, 46, male, named, irish (judged from name)Stephen Silver - 13 Mar2023Jury begins deliberations in trial of Stephen Silver for capital murder of Garda Colm Horkan
Reports the start of jury deliberations, the judge's directions on available verdicts (capital murder, murder simpliciter, manslaughter by diminished responsibility or self-defence), the closing arguments from both sides, and the expert psychiatric evidence on Silver's bipolar affective disorder.
victim, Colm Horkan, male, irish (judged from name)Colm Horkanaccused, Stephen Silver, 46, male, named, irish (judged from name)Stephen Silver - 10 Mar2023Stephen Silver’s shooting of Garda Colm Horkan ‘not a rational act’, jury hears
Defence closing address at Central Criminal Court arguing bipolar affective disorder relapse; Prof Kennedy and Dr Wright gave opposing psychiatric evidence; trial continues for Ms Justice Tara Burns' charge to the jury.
victim, Colm Horkan, male, irish (judged from name)Colm Horkanaccused, Stephen Silver, male, named, irish (judged from name)Stephen Silver - 10 Mar2023Shooting of Garda Colm Horkan was 'not a rational act', defence barrister tells murder trial
Defence closing address at the Central Criminal Court; McGinn SC argued the shooting was not rational and Silver was in a relapse of bipolar affective disorder; two expert psychiatrists gave conflicting evidence on whether mental illness played a part; trial continues with Ms Justice Tara Burns' charge to the jury.
victim, Colm Horkan, male, irish (judged from name)Colm Horkanaccused, Stephen Silver, male, named, irish (judged from name)Stephen Silver - 9 Mar2023Stephen Silver had ‘seething resentment’ towards gardaí, trial told
Prosecution closing statement delivered; prosecution argues deliberate intent to murder and rejects diminished responsibility defence; trial continues with defence closing statement due Friday.
accused, Stephen Silver, 46, male, named, irish (judged from name)Stephen Silvervictim, Colm Horkan, male, irish (judged from name)Colm Horkan - 9 Mar2023Trial told shooting of garda 'a deliberate action with intent of murder'
Prosecution closing statement delivered by Michael Delaney SC on 9 March 2023; defence closing statement due 10 March 2023 before Ms Justice Tara Burns.
victim, Colm Horkan, male, irish (judged from name)Colm Horkanaccused, Stephen Silver, 46, male, named, irish (judged from name)Stephen Silver