Isaiah Usen-Satchell, aged 18, was stabbed to death in the Norfolk Park area of Sheffield in the early hours of Wednesday, January 1.
Five arrests have been made over the killing but nobody has yet been charged.
Isaiah, a Leeds Trinity University student was found injured on St Aidan’s Road and taken to hospital but could not be saved.
With his killer still roaming the streets, here are a number of other men from, or with links to Sheffield, who are wanted by the police over other murders.
Anyone with information about any of the cases should call either South Yorkshire, Humberside or Cleveland Police on 101.
Five arrests have been made over the killing but nobody has yet been charged.