A man facing a life sentence after murdering his mother by throwing petrol at her and deliberately starting a house fire had “regular thoughts” about killing his mum.
Mark See, 34, denied murdering his mother, 63-year-old Sandra See, but was found guilty by a jury after four days of deliberations.
He is due to be sentenced at a later date, Manchester Evening News reported.
Manchester Crown Court heard that the fatal blaze broke out in the early hours of July 13, at the home they shared on Darras Road in Gorton.
See, who had been drinking whiskey and coke all evening, grabbed a plastic milk bottle filled with petrol after rowing with his mother.
Prosecutors said he threw petrol at her before starting a fire after a 'furious, drunken argument'.
See and his girlfriend Natalie Hughes were able to escape, but Sandra See died.
After leaving the house, See drove off in his work van.
"She's dead, she's dead," See was heard saying to Ms Hughes, his pregnant fiance who also acted as his mother's carer.
"Let's leave her, let's go."
Ms Hughes stayed and called 999.
See was only found about 16 hours later, in a churchyard near Manchester Airport.
Police found him lay in the fetal position, having suffered burns to his hands and feet.
Ms See's body was described as being 'incinerated'. She had to be identified by a metal plate in her leg.
Mark See, 34, lay in a daze in hospital for two weeks after.
He overheard news reports on the radio about a fatal house fire in Gorton, but didn't realise the presenter was talking about him.
As he recovered in the burns unit, See made some disturbing comments.
He told a nurse he'd previously had thoughts of killing his mother in a house fire.
See described having 'terrible thoughts' while feeling low, how he thought of hurting himself and others, mainly his mother.
"He has had previous and regular thoughts of killing his mother in a house fire," a jury was told.
"He described hearing a voice encouraging him to do this."
He would later try and explain them away as being comments made as he 'tried to make sense' of what had happened.
See told the jury that the fire was an accident, and denied wanting to hurt his mother.
He claimed that he picked up the milk carton, which he used to store petrol for a lawnmover, to scare his mother into thinking he was going to do 'something stupid' to himself.
They had been arguing about Ms Hughes' role as Ms See's carer, when his mother turned on him and said she wanted him to leave.
See said the bottle ignited when he lit a cigarette and he instinctively threw it on the floor, causing the catastrophic blaze.
He said he tried to save his mother, but had to flee after the flames became too strong.
Prosecutor Francis FitzGibbon QC told jurors during the trial: "We say that once you have heard the evidence you will be sure that Mr See murdered his mother by deliberately setting her on fire with petrol.
"He knew what would happen and intended it to happen."
See couldn't explain why he drove his work van to an area near the cargo centre at Manchester Airport.
He described being 'traumatised and lost' following the death of his mother, who he said he loved 'more than anything'.
Mrs Justice Yip adjourned sentencing until February 25.
She told See that only a life sentence can be passed.
