Detectives investigating the death of a Warwickshire man whose body was found in a burnt-out car are appealing for a potential witness to contact them.
The body of 25-year-old George Tweedie was discovered in the Peak District in Derbyshire in May 2002.
Mr Tweedie's former girlfriend Karen Redshaw, 39, admitted concealing his death, but nobody was ever tried for his murder.
Warwickshire Police said Mr Tweedie's family have recently received a number of phone calls from a man who said he knew how the 25-year-old died and who killed him.
Case never closed
Officers said the family were convinced the caller was genuine and that the person who killed Mr Tweedie will be identified with his help.
Detective Chief Inspector Adrian Pearson, who led the original inquiry, said: "We have never been able to prove who administered the fatal blow that tragically killed George and, in any investigation of this type, the case is never closed.
"Although those involved in George's death have received substantial prison
sentences for the cover up that took place after his death, we still seek to
identify his attacker.
"I am appealing directly to the person who has contacted the family, to contact me and discuss the information that they have".
An inquest ruled last month that Mr Tweedie, who died after receiving a heavy blow to the face, was killed unlawfully.
Nobody was ever tried for his murder after Redshaw blamed her 40-year-old estranged husband Colin for the killing, while he blamed her.
Mr and Mrs Redshaw are serving five and seven years in jail respectively for perverting the course of justice.
Their son Christopher Redshaw, aged 19, formerly of Newdigate Road, Bedworth, was sentenced to 18 months for his part in the conspiracy and has since been released on parole.