Police hunting a man over the stabbing of a children's TV actor have offered a £10,000 reward for information leading to his arrest and prosecution.
Carl Beatson Asiedu, 19, who had appeared in CBBC's MI High, was stabbed in the heart near Club Life nightclub in Vauxhall, south London, in 2009.
Officers want to trace Jeffrey Okafor who fled to Nigeria days after the murder.
The Met Police believe Mr Okafor "delivered the fatal stab wound".
Mr Asiedu, the son of a pastor and a midwife, had been performing at the nightclub as part of a rap group on the night of his death.
Both Mr Asiedu and his friend Peter Lama were stabbed in an attack by a group of men. Mr Lama survived the knifing.
Officers think Mr Okafor left the UK on 17 August 2009, when he was seen on CCTV boarding an Air France flight at Heathrow Airport using his brother's passport.
Mr Okafor's brother, Junior, was sentenced to four years for assisting an offender after evidence in court showed he gave his passport to his brother.
Jeffrey Okafor was seen on CCTV boarding a flight at Heathrow Airport
Mr Asiedu, who had appeared in a small role in episodes of MI High, was about to start the second year of his degree at De Montfort University in Leicester in media production when he was killed.
His father John Asiedu said: "I would urge Jeffrey Okafor to do the right thing and give himself up.
"I believe there are people in Nigeria who know him but don't know who he really is."
Det Insp Alison Hepworth, of the Met Police, said Mr Okafor was probably being supported by people in the UK.
"I would appeal to those people - his friends or family - if you have in some way helped to aid his escape, now is your opportunity to do the right thing and tell us where he is," she said.
In 2011, Junior Ademujimi-Falade, of Camberwell, was found guilty of manslaughter and sentenced to eight years in prison, while Bolaji Kako-Are and Abu Mansaray were convicted of violent disorder and jailed for three years each.