A teenager repeatedly stamped on his friend's head after a dispute over a girl - then went to use his Playstation computer.
Lee Davies, 19, was jailed on Friday, August 6, for six-and-a-half years for the attack on Stephen Taylor.
Mr Taylor, also 19, was kicked unconscious by Davies and left in a pool of blood in an alleyway off Barton Village Road, Oxford, on September 14 last year.
He suffered serious head injuries and spent two months in a coma. He now uses a wheelchair, cannot talk properly and needs full-time care.
James Lachkovic, prosecuting, told Oxford Crown Court the drama unfolded after a birthday party which both men attended.
He said Davies left with Mr Taylor's girlfriend, who cannot be named for legal reasons, and later had sex with her.
The following day, having discovered this, Mr Taylor went looking for Davies, armed with two 10in carving knives.
Mr Lachkovic said Davies was playing football at Barton Community Centre when Mr Taylor appeared with a knife in each hand, running towards Davies. He shouted: "I'm going to kill you."
Davies fled to his grandfather's house in Barton Village Road, where he remained until Mr Taylor was disarmed. When Davies went outside, he followed Mr Taylor and a fight broke out.
A witness described seeing Davies punch Mr Taylor, put him in a head-lock and force him to the ground. Several people saw Davies using "full force" to repeatedly stamp on Mr Taylor's head.
Davies was pulled off by another youth and walked back to his grandfather's house, leaving Mr Taylor unconscious with blood pouring from a head wound.
He was taken to hospital and spent two months in a coma.
Police said after the court hearing that Davies left Oxford as soon as he knew they were looking for him, and may have travelled to Brighton. For a time, he used canals and barges in Oxfordshire to evade capture. He was on the run for four months until he was tracked down in Barton.
Tyrone Belger, defending, said his client did not intend to hurt Mr Taylor as much as he had.
Davies, of Barton Village Road, showed no emotion as Judge Anthony King passed sentence.
The judge told him: "What you did was vicious and unjustified violence. As a direct consequence you ruined that man's life, placed him in hospital for many weeks and he suffered long-term and permanent brain damage.
"When you have completed your sentence you will be a free man. He will not have that luxury. You have altered his life for the worst forever."
Outside court, Geoff McCormack - Mr Taylor's father - said the sentence did not fit the crime.
He said: "I think he (Davies) has got a more lenient sentence because of his age. He deserves the same sort of punishment as Stephen."
Acting Det Chief Insp Andy Bird, of Oxford CID, said: "No sentence can ever make up for the loss to Stephen and his family and our hearts go out to them."
He thanked the community of Barton for its help in the case.
Davies had denied attempted murder and causing grievous bodily harm with intent when he was charged in March. He later changed his plea and admitted causing grievous bodily harm with intent. The maximum sentence for this offence is life imprisonment.
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