A man suffered fatal head injuries after being punched in an unprovoked attack by a teenager during a night out, a jury heard.
Robert Adamczyk, 28, of South Milford near Selby, died shortly after the incident in Leeds city centre after being struck once by 19-year-old Andrew Wright.
Leeds Crown Court heard Mr Adamczyk had been out enjoying a stag night and had just left a karaoke bar with his friend Michael Pollard in the early hours of December 9 last year.
Sam Green, prosecuting, stold the court witnesses described how Wright and his two friends, David Taylor and Kyle Monkman, approached the two men on Harrison Street and appeared to become aggressive. Mr Green said Mr Adamczyk was knocked backwards and did not try to break his fall. The jury were told that as he lay on the ground one of the men stood over him and said: “You have been f****** knocked out!”
The prosecution allege the three men also attacked Mr Pollard before behaving in a “self congratulatory” manner.
The trio then left the scene and joined the queue of a nightclub.
Mr Green said: “The punch that killed Robert Adamczyk was, say the prosecution, an unlawful one. It wasn’t struck in self defence as Andrew Wright was to say later.
“Rather, the prosecution say it was unjustifiable, unjustified and an unlawful piece of violence.”
Wright, of Whingate Grove, Armley, is on trial at Leeds Crown Court where he pleads not guilty to manslaughter and affray.
Taylor, 19, of Prince Edward Grove, Wortley, pleads not guilty to affray.
The jury has heard Monkman, of Barden Place, Armley, has already pleaded guilty to affray.