A POLICE chief says he will not rest until he brings a killer to justice.

Detective Superintendent Brian Dunn is heading the investigation into the death of Middlesbrough vice girl Vicky Glass, whose remains were found on moorland near Danby, North Yorkshire, last November.

He said: "We will continue; we won't give up until we find out what happened.

"It is irrelevant that she was a prostitute, other than the environment where she worked."

Det Supt Dunn made his promise as Marissa, a prostitute friend of Vicky's, appealed for information.

He said: "We are extremely anxious to speak to anyone who is a client of a prostitute, prostitutes themselves, and anyone who visits the Middlesbrough area and uses the overnight lorry park facility at Cannon Park.

"We are anxious for them to come forward, rather than us go searching for them."

Marissa shared the same flat as Ms Glass for three years and worked the same area of Middlesbrough.

She claims to have been frightened off the streets following the murder last year of another prostitute, Kellie Mallinson.

Asked why she had come forward to make an appeal, Marissa said: "She was my friend and, if had been me, I would hope that someone would come forward."

Marissa said that, for their safety, vice girls tried to conduct business with their clients as close to Middlesborough as they could, aware that Cleveland Police's vice squad knew all the favoured areas around the town centre.

Mr Dunn said Ms Glass's killer must be familiar with the North York Moors.

"The place in which the body was found suggests that whoever it was may have had some knowledge of the area," he said.

Anyone with information should contact Cleveland Police, on (01642) 301283