A professional boxer described by a judge as a danger to the public is starting a seven-year prison sentence for killing a Leeds student.
Clifton Mitchell, 21, floored 19-year-old Jagdip Randhawa with a single punch during a night out in the early hours of October 12 last year.
The Leeds University student suffered a serious brain injury after hitting his head on the ground.
He never recovered and died in Leeds General Infirmary five days later.
Mitchell, a super-middleweight fighter from Derby, was initially charged with murder but was convicted of manslaughter last month after a seven-day trial.
Leeds Crown Court heard he had several previous convictions for violent offences.
Sentencing him to seven years in jail with an extended period of three years on licence, judge Mr Justice Maddison said he was a “dangerous offender”.
“You quite clearly have violent impulses that you have not learned to control,” he said.
The court heard Mr Randhawa, who was studying English and linguistics, had been involved in a fight with one of Mitchell’s friends on the night he died.
Mitchell then repeatedly challenged him to a fight before striking the fatal blow on Albion Street in Leeds city centre.
The court was told Mr Randhawa may have survived, but was put on a faulty ventilator when he arrived at hospital, which starved his brain of oxygen. Had he lived he would have been permanently disabled.
In a statement, his family said Mr Randhawa was a “bright, ambitious, caring young man.”
They added: “Words will never describe the life long pain of losing him. Things will never be the same again.
“No sentence will ever be long enough and in no way will it compensate for our loss.”
Det Insp Lisa Griffin, from West Yorkshire Police, said: “Mitchell is a professional boxer who knew that his training and experience gave him the ability to inflict serious violence beyond that of a normal person. He will have been aware of this when he attacked Jagdip who did not pose any threat to him at all.”