A 17-year-old from Rishton has been jailed for four years after being convicted of the manslaughter of Adam Rogers.
William Kingsley Upton, 17, of Ulverston Drive was sentenced following a four day trial at Preston Crown Court.
Adam Rogers, 24, was punched once by Upton, then aged just 16, at around 3.30am on Sunday July 5 in Blackburn. The 24-year-old fell to the ground, never regained consciousness and died later that day as a result of the injuries.
Two 19-year-old men from Rishton, Jonathon Seal from Cliff Street and Antonio Clough from Bridge Street had previously pleaded guilty to actual bodily harm relating to separate assaults arising out of the same incident.
In March Seal was sentenced to six months in prison suspended for two years and ordered to complete 200 hours unpaid community work. Clough was sentenced to 12 months in prison.
Detective Superintendent Neil Hunter, said: "This is a tragic case where a young man has lost his life and no sentence will ever be enough for the pain Adam’s family have suffered due to the complete stupidity and recklessness of this drunken teenager."
Upton will serve a four-year determinate sentence.