Det. Supt Neil Hunter has posted a video on Lancashire Constabulary's website appealing for people to come forward.

>>Click here to watch Det. Supt's video

Mr Street is believed to have been killed at a house on Stockbridge Road on Saturday, December 20th – his body is yet to be recovered.

Last Tuesday, police revealed that blood found in the boot of a blue Mitsubishi Colt, registration PE58 OJY, was Mr Street's. The car had been found on December 30th in Annie Street, Accrington, and detectives believe it may have been used to transport Mr Street's body from Padiham for disposal.

The Mitsubishi is registered to Alan Palmer, who is also the occupant of the bloodstained address in Stockbridge Road where Mr Street is believed to have been killed.

Detectives believe he may have been involved in Mr Street's death and is now on the run with another man, Peter Leonard.

Det. Supt Hunter said: "I want to appeal directly to people who may know something about this murder to come forward. We are yet to recover Alan Street's body and are conducting extensive inquiries in our efforts to find it. I would appeal for anyone, particularly ramblers or dog walkers, who may have seen the Mitsubishi, or a number of men acting suspiciously, on open land between Oswaldtwistle and Knuzden to get in touch.

"We are also concentrating our efforts on the Rivington area, if anyone saw the vehicle while out walking, especially on Sunday, December 21st, I would be extremely interested in speaking with them."

Police have warned anyone who is harbouring the murder suspects that they do so at their peril.

Det. Supt Hunter said: "I believe a number of people have already assisted them in avoiding the police. If anyone chooses this course of action they will be arrested and could face serious criminal charges. If they wish to avoid being arrested, I would strongly advise them to come forward with any information they have which, if necessary, will be treated in confidence.

"From the scene, it is apparent the level of violence used was appalling and despicable. It is vital we recover Alan Street's body and I would like to reassure the public we are doing everything possible to find him, as well as arresting those responsible for the murder but we need their help."

Alan Palmer is described as white, 5ft. 11in. tall, of medium build, with receding/skinhead dark brown hair. He has brown eyes and tattoos on his left arm of a snake head, bull, eagle and swallow. On his right arm he has a snake and skull, and two flower designs with "MAM" and "LUCKY" with a swallow.

Peter Leonard is described as white, around 5ft.8in. tall, of medium build with blue eyes and light brown hair which is cropped very short. He has a 2in. injury scar on his nose and "LOVE" tattooed on the knuckles of his left hand, with "HEIDI" on the back of his left hand.