Fatal attack on Cambridgeshire man 'unprovoked'
The death of a man in Cambridgeshire who was felled by one punch was "unprovoked", police said.
John Stevens, 21, suffered a serious head injury after being punched by Sam Butler, also aged 21, in Vintner Terrace, Cambridge on 1 August 2009.
Butler was convicted of manslaughter at Cambridge Crown Court and sentenced to five years in prison.
Det Sgt Greig Pirie said: "This was an unprovoked attack which caused a young man to lose his life."
He added: "While no sentence can ease the pain for Mr Stevens' family, I hope they will now be able to move on with their lives."
Mr Stevens had been cycling home from a night out when he was punched by Butler.
The victim fell to the ground and hit his head.
He was taken to Addenbrooke's Hospital in the city but died from his injuries the next day.
When arrested, Butler, of Impington Lane, Impington, admitted the assault but claimed he had acted in self-defence.