John Cole, 36, googled "how long in prison if I slit someone's throat" and killed Wendy Cole, his mother, in May last year inside their home in Cambridgeshire, UK.
The 36-year-old had acted as a caretaker for his 70-year-old mother before murdering her on May 10, 2021.
In a disturbing emergency call made in the early hours of the day of the crime, Cole told the operators that he had "done something stupid" and recounted: "I killed my mother and the dog". Cole, who turned himself in to local police, added: "I stabbed her several times, she had thoughts in my head about her, they were telling me to do it."
Police arrived at the family bungalow in March last year in Cambridgeshire, finding a bloodstained knife in the hallway and Wendy lying in bed with stab wounds, but still alive. She unfortunately died 30 minutes later.
When searching the house, the police indicated that in the search history of Cole's laptop they found several questions regarding the time someone would spend in prison for slitting someone's throat or directly about cases in which a son was murdered his own mother.
The 36-year-old killer was found guilty of murder last month after a six-day trial at Peterborough Crown Court. Yesterday, Cole was jailed for a minimum term of 11 years before his release from him is considered.
Detectives discovered that Cole, who had lived with his mother for six years, rarely left his house and was worried about his deteriorating health. Last year he tried to contact housing companies to put Wendy up, but he told social services that he was depressed and worried about the cost.
Cole's sister later told police the family home was clean but her mother was "skin and bone" and had lost a lot of weight. Wendy was said to be reluctant to move to a nursing home.
Two days before the murder, Cole became depressed while grocery shopping and told a staff member that there was nothing his mother could do anymore.
Later that day she fainted again during a visit from her sister and said she couldn't cope. A post-mortem examination concluded that Wendy had sustained stab wounds and cuts to her neck, but she had died from three stab wounds to the chest. There were also minor cuts on both hands that suggested he had tried to defend himself.
DI Rich Stott, from Major Crimes Unit (MCU), said: "This was a thorough and extensive investigation in terribly sad circumstances, and I am glad it has come to a conclusion. What Cole did that day was a brutal and horrific act of violence, in which a woman who was a mother, friend and neighbor tragically lost her life. My thoughts and condolences are with her family of her."