Cortney Batchelor, 21, was out with friends in the early hours of August 23, 2015, when he clashed with 24-year-old Tomas Juska at Club Cookies nightclub in Dunstable, Bedfordshire.
Outside the club, Batchelor threw a single punch at Lithuanian Mr Juska, who fell and hit his head on the pavement.
Mr Juska died in hospital the next day and Batchelor, of Paisley Close in Luton, was soon apprehended by police.
Today, Batchelor was sentenced to four years in prison by Judge Richard Foster at Luton Crown Court.
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He was previously convicted of manslaughter on April 18 following a trial by jury at the same court.
The tragic circumstances surrounding Batchelor’s case were covered in the episode ‘One Punch’ of Channel 4 documentary series 24 Hours in Police Custody.
The episode showed footage of paramedics attending Juska at Court Drive and followed the story right up to Batchelor’s conviction for manslaughter last month.