POLICE have called on Hell's Angels to co-operate more as they hunt the killer of biker Gerry Tobin.

Mr Tobin was gunned down on the M40 as he rode home from the Bulldog Bash bikers' festival in Warwickshire on August 12.

Warwickshire Police have released CCTV footage of the 35-year-old Hell's Angel looking relaxed as he stopped at a petrol station just minutes before he was shot in the back of the head.

Det Supt Ken Lawrence, who is heading the investigation, said the priority was to establish a motive for Mr Tobin's murder.

The murder has prompted fears of a violent feud erupting between rival motorcycle gangs, but Mr Lawrence urged bikers not to take the law into their own hands.

He called on Hell's Angels to co-operate more with the police, saying: "I'm concerned that the Hell's Angels are not coming forward and sharing what information they have with me.

"I'm sure they will have theories about Mr Tobin's death and I'm asking them to share those with the police."