A paranoid cannabis user who tortured his 93-year-old friend for more than 24 hours after becoming gripped by a paranoid delusion has been jailed for a minimum of 22 years14:13, 29 May 2026Updated 14:14, 29 May 2026Boarding a bus to see his best friend - a journey he made every week - 93-year-old Martin Glynn had no idea he was walking into a house of horrors.‌The vulnerable pensioner entered Samuel Michael Field's home in Desborough just as he usually did. But instead of a warm welcome, he was subjected to a horrific 10-hour torture ordeal, before being left abandoned for more than 24 hours. Tragically, he never recovered and later died in hospital.‌Field, 40, has now been given a life sentence with a minimum of 22 years at Northampton Crown Court. He was found guilty of murder after launching a "senseless" attack that involved punching, kicking, stamping on, and strangling his elderly companion.‌The prosecution described Field as a "ticking time bomb" who carried out the savage attack while high on cannabis and gripped by an "imaginary conspiracy theory"During the sentencing, prosecutor Adrian Langdale KC told the court the pair shared a "long-standing imbalanced relationship" spanning nearly two decades.‌Mr Glynn had originally shown kindness to Field, "foolishly" taking him into his flat after Field was released from prison on probation. Field eventually moved into a property nearby, where he began systematically exploiting the pensioner.The court heard that Mr Glynn had been blackmailed into handing over a "a significant amount of money" to his supposed friend. Financial analysis revealed 701 ATM cash withdrawals made by Mr Glynn between 2018 and 2024. In his final years alone, between September 2021 and the time of the attack, the terrorised pensioner withdrew £21,780 in cash - handing over £200 in an envelope during his weekly visits.The court heard that Field’s mental health had drastically declined due to heavy cannabis abuse and self-inflicted sleep deprivation. He became consumed by a paranoid delusion that his elderly friend had betrayed him by giving a key to his home to an Irish traveller.‌Driven by a desire to elicit a 'confession', Field quizzed Mr Glynn before launching a relentless attack, strangling the pensioner severely enough to fracture his neck.In hospital, the 93-year-old told Detectives: "Samuel had put his hands around my neck and squeezed. It hurt so much [I] could not eat or swallow properly."Langdale said Mr Glynn had endured "mental and physical suffering" after "being subjected to an interrogation, abandoned in a cold and wet shower cubicle" and left unable "to speak, communicate, feed himself or look after himself".‌Chillingly a camera hidden inside the home captured Field casually walking about after the attack, acting as if nothing had happened, while Mr Glynn's feet lay still and motionless on the floor. More than 24 hours later, on September 20, Field finally called an ambulance and offered a full confession, telling police that he had "assaulted someone."Police found Mr Glynn "unceremoniously dumped" and semi-conscious in the shower. He was rushed to Northampton General Hospital, where he was diagnosed with multiple bleeds on the brain and a fractured neck.Though he fought for his life, he succumbed to his devastating injuries three months later on Boxing Day. Before he passed, he used his final words to give a statement, exposing Field's cruelty.‌Det Sgt Bergin said in his witness statement: "Martin informed me [that] Sam put his hands around his neck and squeezed. He said that Sam stated he was out to kill him. He squeezed so tightly that Martin thought he was going to die."He stated that he's given Sam Field thousands of pounds. He visited him every week and would give him £200 in an envelope. It's been an ongoing arrangement since he got out of prison. He said he tormented him and blackmailed him."When forensic scientists searched the flat they discovered a blood bath. Blood was found smeared on the walls, floor and skirting, alongside blood-soaked tissues and a pillow. DNA testing proved that the blood was a billion-to-one match for Mr Glynn.‌Field was convicted of murder after opting to represent himself midway through the trial. Jurors were forced to listen to a "harrowing" recording which detectives described as a "tortured confession".The court heard Field was previously jailed after he assaulted a three-year-old child by striking their head and legs in 2007 and punched the head of a one-year-old baby who was in a cot in 2008.Mr Langdale said the attacks on the children are “chilling echoes” to the murder of Mr Glynn because Field “targeted the head area of vulnerable individuals” in all three cases.‌The judge said: “There is no doubt that those offences show that you are prepared to use violence towards those who are vulnerable and at your mercy.”In a victim impact statement, read to court by the prosecutor on behalf of Mr Glynn’s family who live in Ireland, his relatives said he was a “quiet, soft-spoken man”.They added: "The impact of losing Martin has been very distressing for our family. Such evil bestowed on such a kind, gentle, caring, loving, giving, good humoured, inoffensive soul. It was very upsetting to hear he suffered so much.”‌Speaking after the verdict, Deputy Senior Investigating Officer, Detective Sergeant Megan Scotney, of the East Midlands Special Operations Unit said: “Samuel Field described Mr Glynn as his best friend of almost two decades."However, instead of looking out for Mr Glynn, Field exploited their friendship and tortured the 93-year-old over 10 hours, inflicting the most horrific injuries on a vulnerable man, which ultimately cost him his life."Mr Glynn lived independently and through his loyalty to Field, travelled more than two hours from his home in Northampton to Desborough at least once, sometimes twice a week to visit him.Article continues below"Only Field knows why he attacked Mr Glynn that day, but I am pleased the jury has seen him for what he truly is – a dangerous, violent man. Nothing can bring Mr Glynn back, but I very much hope this guilty verdict offers his loved ones some comfort. Our thoughts remain with them all in their grief."