Personal trainer John Peters jailed for two years and two months for assault of ex-girlfriend Rianna Moore
John Peters, a 33-year-old personal trainer and businessman with a women-only gym in Dún Laoghaire, pleaded guilty at Dublin Circuit Criminal Court to assaulting his ex-girlfriend Rianna Moore and causing criminal damage to her phone on dates in 2022 and 2023. The first assault, on 10 July 2022, saw Peters drag Moore to the floor where her face struck the carpet, and he later sent a voice note telling her to attribute the injuries to their dog. The couple had been in a relationship for three years and began cohabiting in late 2021. On 4 June 2026, Judge Martina Baxter sentenced Peters to concurrent terms of three years for assault causing harm, two and a half years for criminal damage, and six months for assault, suspending the final 10 months for an effective two years and two months.
- Reportednot reported
- Arrestednot reported
- Chargednot reported
- In courtnot reported
- Verdictnot reported
- Sentenced4 Jun
Key facts
consolidated from all reports- What happened
- John Peters, a 33-year-old personal trainer and businessman with a women-only gym in Dún Laoghaire, assaulted his ex-girlfriend Rianna Moore.
- On 10 July 2022, following an argument, Peters dragged Moore to the floor where her face struck the carpet, causing a nosebleed, a large bruise on her arm, a graze to her finger, and damage to her eyebrow.
- Peters sent a voice note telling Moore to say the injuries were caused by their dog and to wear clothing to cover her arms.
- In a further incident, Peters ripped a pyjama top off Moore, leaving marks under her arms.
- The couple were in a relationship for three years and began cohabiting in late 2021; the last year to 18 months were described as turbulent.
- When
- The first assault occurred on 10 July 2022 in the apartment, and the charges relate to dates in 2022 and 2023.
- Charges
- Peters was charged with assault, assault causing harm, and criminal damage to a phone.
- In court
- Peters pleaded guilty at Dublin Circuit Criminal Court, and Judge Martina Baxter noted the plea spared Moore from giving evidence and being re-traumatised.
- Sentence
- Judge Baxter imposed concurrent sentences of three years for assault causing harm, two and a half years for criminal damage, and six months for assault, suspending the final 10 months for an effective two years and two months.
- Other details
- Peters has no previous convictions.
- The judge identified the intimate relationship and the significant effect of the aggression on Moore as aggravating factors.
- Moore said the day marked the end of a long legal process that had a profound impact on her life.
19 statements extracted from the articles
- whatJohn Peters is a personal trainer and businessman with a women-only gym in Dún Laoghaire. (irishtimes.com)
- whatMoore was dragged downwards by Peters and her face struck the carpet, leaving blood coming from her nose. (irishtimes.com)
- whatThe assault left Moore with a large bruise on her arm, a graze to her finger and damage to her eyebrow. (irishtimes.com)
- whatPeters sent a voice note telling Moore to say the injuries were caused by their dog and not to say she fell. (irishtimes.com)
- whatPeters also told Moore to wear clothing to cover her arms. (irishtimes.com)
- whatIn a further incident, a pyjama top was ripped off Moore by Peters, leaving marks under her arms. (irishtimes.com)
- whatThe couple were in a relationship for three years and began cohabiting in late 2021. (irishtimes.com)
- whatThe last year to 18 months of the relationship were described as quite turbulent. (irishtimes.com)
- whatThe judge noted that Peters' physicality and training was utilised against Moore. (irishtimes.com)
- whenThe first assault occurred on 10 July 2022 in the apartment following an argument. (irishtimes.com)
- chargeThe charges were assault, assault causing harm and criminal damage to a phone. (irishtimes.com)
- courtPeters pleaded guilty at Dublin Circuit Criminal Court. (irishtimes.com)
- courtThe judge noted the guilty plea spared the injured party from giving evidence and being re-traumatised. (irishtimes.com)
- courtGarda Aisling Hawkes gave evidence and Jane McGowan was prosecuting. (irishtimes.com)
- sentenceThe judge sentenced Peters to three years for assault causing harm, two and a half years for criminal damage and six months for assault, all to run concurrently. (irishtimes.com)
- sentenceThe final 10 months of the sentence were suspended. (irishtimes.com)
- otherPeters has no previous convictions. (irishtimes.com)
- otherThe judge identified the existence of an intimate relationship and the significant effect of the aggression on the injured party as aggravating factors. (irishtimes.com)
- otherMoore said the day marked the end of a long legal process that had a profound impact on her life. (irishtimes.com)
The reporting
newest first- 4 Jun2026Personal trainer and owner of women-only gym jailed for assault of ex-girlfriend
Sentencing report: Judge Martina Baxter imposed concurrent sentences of three years for assault causing harm, two and a half years for criminal damage and six months for assault, suspending the final 10 months. The court heard details of the first assault on 10 July 2022 in which Moore was dragged to the floor, and Peters' subsequent attempts to manage the appearance of her injuries.
victim, Rianna Moore, female, irish (judged from name)Rianna Mooreconvicted, John Peters, 33, male, named, irish (judged from name)John Peters