The parents of a man deliberately run over and killed have claimed they and others who are too scared to come forward know who his murderer is.
David Lees suffered fatal head injuries
David Lees, 23, was knocked down after a fight between his friends and a group of Asian youths on a garage forecourt in Prestwich on 28 October last year.
His parents, Don and Anne Lees, believe they know who was behind the wheel.
No-one has been charged with his murder but police have said they are "committed" to finding his killer.
Don Lees, 49, of Heathbank Street, Blackley, said: "We won't rest until he's caught, and we know who's done it, and police know who's done it and the witnesses who were on the forecourt know who's done it."
Mrs Lees, 48, said: "There are people living in this community who know who killed our son - and I'm begging them to tell the police who did it and make a full statement.
"They would be wanting answers if it was their son or brother who had been killed in this way.
"My husband and I do not have a life at the moment and we just want justice and closure."
Mr Lees was hit by a silver Vauxhall Vectra, registration number T313 NCR, outside a BP petrol station on Middleton Road.
Police said the car sped up to between 60 and 70mph before it drove directly towards him as he stood in the middle of the road.
He suffered fatal head injuries and later died at North Manchester General Hospital.
The car was then driven to the gates at Heaton Park, where the driver met with friends in other cars before heading to south Manchester.
Det Ch Insp Sam Haworth, leading the murder investigation, said: "This has been a lengthy and detailed investigation and we remain committed to find David's killer.
"We have already successfully convicted the owner of the Vauxhall Vectra after he lied about selling the car on.
"All we need is for one person to be brave enough to come forward and do the right thing so we can bring the people responsible before the courts and give his family the justice they deserve.
"These people cannot be allowed to get away with what they have done."
The car's registered owner, Arfan Javed, from Longsight, was sentenced to two years in jail at Bolton Crown Court in August for perverting the course of justice by not telling the police the driver's name.