Peter McMahon Murder: Sharon Swinhoe Case Revisited in Newcastle 2026

Key Points

• The Victim: Peter McMahon, a 68-year-old retired civil servant and granddad who lived in the West End of Newcastle upon Tyne.
• The Killers: His much younger partner Sharon Swinhoe, 44, and her besotted accomplice Joseph Collins, 54. A third accomplice, Ronald Douglas, 77, helped transport the corpse.
• The Crime: Mr McMahon was tricked by the promise of a rekindled romance, subjected to a torture-like beating, then murdered by Swinhoe, who dug out his eyes using her long fingernails, resulting in a fatal cardiac arrhythmia.
• The Disposal: Following weeks in a dog kennel outside, his corpse was moved via suitcase to a chest freezer inside the apartment of Collins in a tower block.
• Court Verdicts: Sharon Swinhoe was sentenced to life imprisonment with a 25 year minimum sentence. Joseph Collins was jailed for life with a 20 year minimum sentence. The facts were so gruesome that the trial judge waived the jury from jury service for life.

Newcastle (New Castle Time) September 14, 2026 – In one of the most chilling and disturbing homicide investigations in North East England’s modern history, the tragic murder of retired civil servant Peter McMahon has resurfaced in public memory as ITV revisits the atrocity in its documentary series The Truth About My Murder.

The 68-year-old grandfather from Newcastle’s West End suffered a horrific end at the hands of his 44-year-old partner, Sharon Swinhoe, and her accomplice, Joseph Collins, 54. Over a period of weeks, Mr McMahon was subjected to physical violence, fatal torture, and degrading indignity, culminating in his body being stored inside a chest freezer in a high-rise residential apartment block.

The harrowing case, which led the trial judge to grant the jury a lifetime exemption from future jury duty due to the severe nature of the evidence, continues to serve as a stark reminder of manipulation, financial exploitation, and extreme violence.

What Happened to Peter McMahon in Newcastle?

As reported by Sophie Doughty, Crime Reporter for Chronicle Live, retired civil servant Peter McMahon was a well-liked, quiet, and generous grandfather residing comfortably on two pensions in the West End of Newcastle upon Tyne. Mr McMahon was a father to two adult sons, Andrew and Steve, and was widely regarded by friends and acquaintances as a gentle man who frequently offered help and financial support to those around him.

However, his life took a dark turn after he met Sharon Swinhoe at the Metropolitan Bar in Elswick, Newcastle. Swinhoe, who was 24 years younger than Mr McMahon, managed to cultivate an intense hold over him. According to evidence presented at Newcastle Crown Court, Swinhoe viewed Mr McMahon as a financial target or “sugar daddy,” systematically exploiting his affections and pension income for her personal financial gain.

As reported by Chronicle Live, Gary Battista, a close friend of Mr McMahon, cautioned him regarding the nature of the relationship. Mr Battista recalled warning Mr McMahon:

“She had a huge hold over him. All he wanted was a bit of care and a bit of happiness. We told him it was never going to happen with her. We tried to warn him, but he couldn’t see that. He was so besotted with her”.

Similarly, Ms Dentith, the landlady of The Metropolitan Bar, testified in court that Mr McMahon was a decent and intelligent man. As covered by Chronicle Live, Ms Dentith stated during trial proceedings:

“I didn’t think much of Sharon and I didn’t approve of their relationship, I thought she was taking advantage of him”.

How Was the Fatal Attack Carried Out by Sharon Swinhoe and Joseph Collins?

On 18 October 2012, Mr McMahon took a taxi to Sharon Swinhoe’s residential property on Crawford Terrace in Walker, Newcastle, believing the couple were about to reconcile their romantic relationship. Instead, upon his arrival, he was ambushed by Swinhoe and Joseph Collins, an accomplice who was also fixated on Swinhoe.

As revealed in the ITV documentary The Truth About My Murder, presented by world-renowned forensic pathologist Dr Richard Shepherd, the assault inside the property was relentless and sadistic.

Retired Detective Brian Hook, who served 30 years with the Metropolitan Police Service, reflected on the case during the television broadcast. As quoted in The Express, Mr Hook stated:

“Swinhoe boasted in prison about the blood that was under her fingernails after she gouged out Peter’s eyes. She was the main player, she was the catalyst, undoubtedly”.

Prosecution evidence presented by Mark Giuliani at Newcastle Crown Court, as reported by Chronicle Live, detailed the extensive trauma inflicted on Mr McMahon’s body. Prosecutor Mark Giuliani noted:

“The post-mortem showed evidence of injuries, including broken bones and damage to the eyes”.

Home Office Pathologist Dr Jennifer Bolton provided expert medical testimony explaining that Mr McMahon sustained a fractured nose, a fractured eye socket, facial bruising, and extensive body contusions caused by multiple impacts from punches or kicks.

Dr Bolton clarified the specific medical mechanism of death, stating in court:

“There has been some form of blunt force assault and this has resulted in bruising to the left side of the face and a fracture to the nose and bruising to the mouth… The gouging of the eyes caused a fatal cardiac arrhythmia”.

The intense pain and traumatic shock forced Mr McMahon’s heart into a fatal rhythm, bringing an end to his life.

How Did the Murderers Attempt to Hide the Body in a Chest Freezer?

Following the murder, Swinhoe immediately began draining Mr McMahon’s bank accounts, taking advantage of his funds while leaving his body hidden. The logistical challenge of concealing the crime led Swinhoe, Collins, and a third associate, 77-year-old Ronald Douglas from Blaydon, Gateshead, into a complex plan to hide the remains.

Initial attempts to bury the body in the back garden of the Crawford Terrace property failed. Consequently, the perpetrators crammed Mr McMahon’s remains into an outdoor dog kennel in Swinhoe’s garden, where the body lay undiscovered for several weeks.

Later, a chest freezer was purchased specifically for the purpose of hiding the victim. Swinhoe and Collins placed the body into a suitcase and transported it to Collins’ flat at The Sycamores tower block in Cruddas Park, Elswick.

CCTV security footage recovered by Northumbria Police investigators captured Swinhoe, Collins, and Douglas inside the elevator of the tower block shortly after moving the body. As reported by Chronicle Live, the footage showed the killers displaying chilling composure, with Swinhoe standing calmly and holding her handbag while chatting with the men.

When police eventually raided Collins’ apartment in December 2012, they discovered Mr McMahon’s body inside the chest freezer in Collins’ bedroom. Pathologist Dr Jennifer Bolton recalled the discovery:

“At the time it was discovered the body was in a chest freezer surrounded by frozen liquid… wrapped in a length of material tied at both ends”.

Investigators noted that Mr McMahon’s wristwatch inside the freezer was still displaying British Summer Time, confirming he had been killed prior to the end of October.

What Decisions Were Made in Newcastle Crown Court During the Murder Trial?

The six-week trial took place at Newcastle Crown Court, where both Sharon Swinhoe and Joseph Collins denied murder and attempted to shift total culpability onto one another.

As reported by ITV News Tyne Tees, Swinhoe took the witness stand and claimed she knew nothing about the murder until after Mr McMahon was already dead. She alleged that Joseph Collins had punched Mr McMahon and hidden his body without her knowledge. However, the jury rejected her defense after reviewing extensive forensic evidence, bank records, and witness testimony.

The trial was deeply emotional for those present. As noted by reporter The Express, details of the torture and post-mortem indignity moved seasoned court journalists to tears, and Mr McMahon’s son collapsed inside the courtroom during the presentation of evidence.

Upon delivering the guilty verdicts for murder against Swinhoe and Collins, the presiding judge, Mr Justice Globe, addressed the courtroom with stern words.

Addressing Sharon Swinhoe directly, Mr Justice Globe stated:

“I’ve no doubt even now you have got no regret for what you’ve done. You seemed to care more for the rats that you kept as pets than the life of the man who loved you, asked to marry you and bought you a £1,100 engagement ring”.

Addressing Joseph Collins, Mr Justice Globe remarked that his role was subordinate to Swinhoe’s, noting:

“Joseph Collins’ role was as subordinate to Sharon Swinhoe. I’ve no doubt at all that she was the one in control”.

Due to the horrific nature of the injuries and the callous treatment of the deceased, Mr Justice Globe took the exceptional step of ruling that all members of the jury would be exempt from jury service for the rest of their lives.

Following the trial, Gerry Sydenham of the Crown Prosecution Service issued a formal statement on the verdict. As reported by The Express, Gerry Sydenham stated:

“It is clear from the evidence in this case that Swinhoe manipulated Peter McMahon in the same way that she manipulated the two men who would later assist her in his murder and the disposal of his body”.

Sentences Handed Down to the Defendants

Defendant	Charge	Sentence / Outcome
Sharon Swinhoe	Murder & Conspiracy to Pervert the Course of Justice	Life imprisonment with a minimum term of 25 years. (Died in prison in 2021).
Joseph Collins	Murder & Conspiracy to Pervert the Course of Justice	Life imprisonment with a minimum term of 20 years.
Ronald Douglas	Conspiracy to Pervert the Course of Justice (Cleared of Murder)	Convicted of helping to conceal and move the body.

What Happened to the Perpetrators After the Trial?

Sharon Swinhoe began serving her life sentence at HMP New Hall. However, eight years into her 25-year minimum prison term, Swinhoe contracted COVID-19 while incarcerated. She was transferred to a hospital, where she subsequently died in 2021 at the age of 52.

Joseph Collins remains incarcerated serving his life sentence, having been ordered to complete at least 20 years before becoming eligible to apply for parole.

The case of Peter McMahon stands as one of the most haunting murder investigations handled by Northumbria Police. As highlighted in ITV’s The Truth About My Murder, the combination of painstaking forensic pathology and traditional police work ultimately unraveled the web of deceit, securing justice for a respected retired public servant whose life was tragically cut short.