Forensic experts in white suits are examining a flat where a young man was stabbed to death.
The police team is carrying out a painstaking examination of the crime scene and the area outside the house in Southey Avenue, Longley, where Jordan Hill was stabbed last night.
The 21-year-old, who was a dad, was found injured at around 9.45am and was taken to hospital but was later pronounced dead.
A murder probe is underway.
Anyone with information should call South Yorkshire Police on 101.