Adam Rogers died in hospital
A teenager has been found guilty of killing an innocent "peacemaker" with a single punch in a row in Lancashire.
The 17-year-old, who has not been named because of his age, was convicted of the manslaughter of Adam Rogers, 24, in Blackburn in July last year.
Mr Rogers, a football coach, tried to break up a row between his killer and his group of friends after a night out.
At Preston Crown Court, the defendant claimed he had only punched Mr Rogers in self defence.
Mr Rogers hit his head on the ground and died in hospital a day after the attack.
Jonathon Seal and Antonio Clough, both 19 and from Rishton, Lancashire, previously pleaded guilty to actual bodily harm in connection with the incident, admitting they had attacked Mr Rogers' friends.
All three will be sentenced at Preston Crown Court on 8 March.
CCTV footage of the incident was played to the jury showing Mr Rogers trying to calm the defendant down.
"The Crown say that the defendant had no reason to punch Adam Rogers. Adam had posed no threat to him and only tried to speak to him.
"He was the peacemaker, ushering (the defendant) away from the scene," Michael Lavery, prosecuting, told the court.
Adam Rogers coached Padiham Ladies' football team and was a "fit, healthy, athletic man", Det Supt Neil Hunter, of Lancashire Police, said.
"This is a tragic case where a young man has lost his life due to the complete stupidity and recklessness of a young teenager who had clearly consumed far too much alcohol.
"Adam's death was entirely preventable and has ruined the lives of so many people.
"Incidents of this nature have a devastating effect on so many lives not least of which are the Rogers family who have had their son taken away from them in the prime of his life and with his whole life ahead of him."