A serial domestic abuser who met a new girlfriend on Snapchat and threatened to sexually abuse her teenage daughter and put her terminally-ill father "10ft under" has been jailed for 16 months. Sean Marr, 40, of no fixed address, was sentenced at Liverpool Crown Court on October 19 after admitting breaching a stalking protection order and sending offensive, indecent, obscene or menacing messages.
Threats against daughter and terminally-ill father
The court heard that Marr, formerly of Blackburne Place in Liverpool city centre's Georgian Quarter, formed a relationship with a woman from Tamworth in December 2025 after the two met via Snapchat. The relationship lasted around a month, with the woman - a previous victim of domestic abuse who the ECHO has chosen not to name - ending it in January this year.
Prosecutor Kevin Liston described how Marr repeatedly messaged and called her, making threats against her daughter and father. He told her he wanted to have sex with the girl, who was aged under 16, and warned he would put her terminally-ill father "10ft under".
Google search uncovered 'nice guy's' past
Marr has a total of 28 previous convictions for 78 offences. The ECHO previously reported that one court appearance in February last year concerned another relationship with a woman he had similarly befriended over Snapchat.
In that case, Marr appeared to be a "nice guy" and claimed he was "against men being abusive towards women". The woman learned of his string of previous convictions for abusing former partners after Googling his real name. When confronted over this history, he subjected her to a campaign of harassment, threatening to "come for her parents".
In September 2023, Marr was handed a 15-year stalking protection order, which prevents him from directing threats and abuse towards any partner, ex or family member.
Defence cites brain injury and traumas
Peter White, defending, told the court: "Mr Marr has there wherewithal to realise that his behaviour was unacceptable and wholly unconscionable. He can only apologise. He says that he acts on impulsivity."
White added that Marr was the victim of a serious assault in prison in 2014, which resulted in a brain injury, and has witnessed a murder and his father's suicide. "He accepts that it does not offer any explanation or justification and his conduct has been very poor throughout, but that is in the background," White said. "Mr Marr tells me that he hopes to, on this occasion, use his time in custody as best as he can. He tells me that he is fully willing to engage in any sort of programme."
Judge: 'High risk to partners'
Sentencing, Judge Gary Woodhall said: "You were in a relationship together between December 2025 until January 2026. When she ended the relationship, you repeatedly messaged and called her. You made disgusting threats to her daughter and her father, who was then terminally ill.
"They included you threatening to assault and have sex with her underage daughter and kill her father. You threatened to post pictures of her on the dark web. You suggested that it was due to your brain injury.
"I am told about your brain injury from 2014 and other traumas that you have had to endure. You have your own children, but you are not allowed any contact with them. Your victim has previously been a victim of domestic abuse. Making the sort of threats that you did about her underage daughter must have caused her distress.
"This is a case where the seriousness of the offending means that appropriate punishment can only be achieved by immediate imprisonment. I am also satisfied that there is no realistic prospect of rehabilitation. I am satisfied that you are unlikely to comply with court orders. You present a high risk to partners and a high risk of reoffending."
Marr appeared via video link to HMP Liverpool wearing a red Montirex t-shirt. He was jailed for 16 months and handed a 15-year restraining order.
