Forensic specialists have discovered a scientific profile of a mystery female on a leather bag strap found at the spot where the 18-year-old student was stabbed by a racist gang in 1993.
It is not clear if detectives believe the unidentified girl or woman could be a suspect, a friend or accomplice of the gang or a witness.
Stephen’s friend Duwayne Brooks, who escaped the unprovoked mob attack, has never suggested a female was involved.
The discovery was made last year after new tests were carried out on several items recovered after the murder in Eltham, south-east London.
Scotland Yard announced at the time it was hopeful the potential new evidence would lead to a breakthrough, but have waited until now to reveal what it found.
Various people connected to the investigation were asked to give DNA swabs so they could be eliminated.
Two men – Gary Dobson and David Norris – were convicted and jailed for Stephen’s murder in 2012 after DNA, hair and fibre evidence linked them to the killing.
Police believe there were up to six white youths involved in the attack and are determined to identify other suspects.
The Metropolitan Police was widely condemned for its original failed investigation, which led to a public inquiry that resulted in the force being branded “institutionally racist” by judge Sir William Macpherson.
The judge concluded that alleged police corruption had not hampered the investigation.
Detectives are also still trying to identify another potential witness, a man wearing a distinctive top who was caught on CCTV in an off-licence before the murder and seen later near the scene at the time of the stabbing.
The new appeal will be made on BBC’s Crimewatch on Monday evening.
News Source SkyNews