Paul Michael Jones was backing away from John Chivers, the court heard
A man who stabbed his close friend in the heart twice has been jailed for life at Cardiff Crown Court.
John Austin Chivers, 30, attacked Paul Jones with a kitchen knife after he was challenged for pushing over a woman.
Chivers, of Barry, Vale of Glamorgan, had denied murder claiming self-defence, but was found guilty.
Judge Mr Justice Wyn Williams said Chivers was "more than a match" for Mr Jones, 41, despite having only one leg, and must serve at least 18 years.
The court heard Chivers flew into a drunken rage after Mr Jones intervened following the incident with the woman and the two men began fighting in the street.
Michael Chambers QC, prosecuting, said Chivers fetched a "sharp and vicious" kitchen knife and went out bare-chested into the street.
Mr Chambers said: "He brandished the knife, pursued Mr Jones as he walked backwards holding his hands up in the air and stabbed him twice in the chest.
"Mr Jones started bleeding profusely and collapsed in the road with gaping wounds in his chest and his heart penetrated in two places."
The court heard that Chivers later told police: "I ain't a bad person. He attacked me on my own doorstep. He swung at me and I got him with the knife."
The attack happened in a 'quiet residential street'
Mr Justice Wyn Williams said Chivers confronted his friend in a bid to cause him serious harm.
He said: "This was a killing in a quiet residential street at night. You used a knife to stab Mr Jones through the heart twice.
"There was at first a fist fight which you were always going to win - you are 6ft 2in and 14 stone - the defendant was 5ft 5 and 11-and-a-half stone.
"Even allowing for your significant disability you are more than a match for Mr Jones."