Police in Bradford are appealing for fresh information three years on since a young man was assaulted and died in Attock Park, Laisterdyke.
21- year-old Beyake Keita Ann suffered serious head injuries when he and his friends, who were playing football, were attacked by a group of men. He then died in hospital three weeks later.
A murder investigation led to the arrests of more than 20 people. This inquiry is continuing and a number of suspects remain on bail.
Today there is an under 16's five-a-side football tournament as part of a community event being held in his memory between 11am -5pm in the park. A big screen will be showing information about the appeal. Anyone with information is asked to contact the police or Crimestoppers on 0800 555111.
A reward of up to £10,000 is being offered for information received which leads to a successful conviction.