Following a lengthy Thames Valley Police investigation, four people have today (7/8) been sentenced after they were convicted of various offences following the death of a man in Oxford on 24 April 2022.

Morton Morton, aged 35, of Coriander Way, Oxford, was unanimously convicted at Oxford Crown Court on 18 December 2025 of perverting the course of justice.

Michaela Pomeroy, aged 33, of Stowford Road, Oxford, was unanimously convicted on 4 June 2026 at the same court of perverting the course of justice.

Today, they were both jailed for one year and two months for the offences.
Tia Pomeroy, aged 20, of Stowford Road, Headington, was unanimously convicted on 18 December 2025 of assault occasioning actual bodily harm (ABH) and perverting the course of justice by avoiding arrest and frustrating the police investigation.

Mason Robins, aged 21, of Elderfield Road, Bicester, was unanimously convicted on the same date of perverting the course of justice by avoiding arrest and frustrating the investigation.

Tia Pomeroy was today sentenced to two years’ detention, suspended for 18 months, and Robins to one years’ imprisonment, suspended for 18 months.

On 24 April 2022, officers were called to the address of Peter Crowley, who was 50-years-old, in Brome Place, Headington, following a concern for welfare report.

Sadly, Mr Crowley was found deceased inside the property and a murder investigation was launched.

The investigation established that, at around 9.30pm on 23 April 2022, Mr Crowley had been walking home with a friend when they were approached by Tia Pomeroy and Mason Robins.

Mr Crowley was attacked by Pomeroy, who at the time was 16-years-old, during an altercation linked to an earlier non-suspicious death of Mr Crowley’s partner, Gemma Pomeroy, aunt of Tia.

Mr Crowley was taken home by a friend following the assault and was alive when the friend left.

However, the next morning, Sunday 24 April 2022, officers attended Mr Crowley’s address where they located him deceased.

A post-mortem examination later confirmed that Mr Crowley’s death was caused by mixed drug toxicity and alcoholic liver disease and not due to an assault and so the murder investigation was discontinued.

However, extensive enquiries continued into the actions of the four people in the lead up to Mr Crowley’s death, which found that Pomeroy had assaulted him prior to his death.

The court heard that, after the incident involving Mr Crowley, Pomeroy and Robins were assisted by others who believed they were wanted in connection with the investigation.

The investigation found that attempts had been made to move and harbour suspects following Mr Crowley’s death, subsequently frustrating the police investigation.

Investigating officer Detective Constable Kevin Smith from the Major Crime Unit said: “Firstly, my thoughts remain with the family and friends of Peter Crowley.

“They have had to endure a long and difficult journey since Peter’s death, and I hope that these convictions provide them with some measure of justice.

“Peter was subjected to an assault by Tia Pomeroy prior to passing away.

“The assault was a wholly unnecessary attack and although it was found that the assault by Pomeroy on Peter was not a causative factor to his death, the evidence presented during the investigation and at court demonstrated the involvement of those responsible, and the jury’s verdicts reflect the strength of that evidence.

“This case also highlighted the actions of others who sought to assist those responsible after the offence had been committed. Rather than allowing the criminal justice process to take its course, steps were taken to move and harbour suspects and frustrate the police investigation.

“Such actions undermined our investigations and caused further distress to Peter’s family and friends.

“These convictions are the result of a thorough and painstaking investigation involving specialist detectives, forensic experts, uniformed officers and partner agencies.

“I would like to thank everyone who contributed to the investigation, as well as members of the public who provided information and supported our enquiries.

“Thames Valley Police remains committed to pursuing not only those who commit the most serious offences, but also those who seek to protect offenders or obstruct investigations.

“We will continue to work tirelessly to ensure that those responsible are identified, brought before the courts and held accountable for their actions.

“Finally, I would again like to pay tribute to Peter’s family, who have shown remarkable dignity and strength throughout the investigation and court proceedings.”