A DISABLED man stabbed his carer in the heart after rowing over a round of drinks.
Patrick Lavery, 59, killed 60-year-old Alan Cadman after bickering about whose turn it was to stump up for more booze.
The half-blind killer claimed he accidentally fell on his victim. "We were pissing about," he told cops.
But Lavery now faces years behind bars after Old Bailey jurors found him guilty of manslaughter.
The court heard how Mr Cadman helped Lavery around the flat because of his poor eyesight and had a key to the flat on the Adams Gardens Estate, Rotherhithe. Friends described the victim as being Lavery's unofficial carer. But the pair fell out while drinking with friends and watching horse racing on TV on March 15 last year.
Prosecutor Richard Whittam said: "They exchanged words and Mr Cadman put his key on the table, saying words to the effect of, 'If that's what you want, I won't be coming here again'." Later that evening Lavery made an emergency call to report a stabbing at his flat.
Police found him sitting on the sofa with Alan Cadman lying in a foetal position on the floor.
Mr Cadman died nine days later in hospital.
Lavery told police: "I hold my hands up, I stabbed him. We were pissing about."
Lavery was convicted of manslaughter on Friday. Judge Stephen Kramer adjourned sentencing until February 23 for psychiatric reports to be carried out.