DETECTIVES hope that new forensic technology will help solve the murder of teenage Bradford mum Rebecca Hall.

The 19-year-old's brutal killing is one of several Bradford murders which are now being reviewed by West Yorkshire Police's cold case investigation team.

Rebecca, known as Becky, disappeared 15 years ago today on Good Friday, April 13, 2001. She was last seen leaving her home at Lydford House, off Elizabeth Street, Little Horton, at 10pm.

Her naked and battered body was found in an alleyway off Thornton Street, in Bradford's red light district, 13 days later. She had been subjected to a vicious and brutal beating and died from severe head injuries.

Becky was a sex worker and detectives believed she was heading for her "beat" on Thornton Road when she was snatched from the street.

Her body was discovered by a passer by, at a place regularly used by prostitutes and their clients. Her clothes were found nearby.

Becky had a four-month-old son at the time of her murder. Jordan, who has been brought up by his grandmother, is now aged 15. Becky had never spent a night away from him.

The cold case review team will use advances in forensic science to try to identify who was responsible for Becky's death.

Detective Superintendent Mark Ridley, who is leading the investigation, said: "We remain determined to identify and bring to justice those who were responsible for Becky's death.

"The cold case investigation team will use advances in forensic technology to try to identify those who were responsible and hopefully provide Becky's family with the answers as to who murdered her and why.

"We still believe that someone in the community is likely to know who was responsible for her death, and I would urge that person to come forward and contact the police.

"There is a chance that allegiances might have changed in the years which have passed, and that the person who holds the vital information could now be in a position to speak to us and tell us everything they know."

Following Becky's murder, police distributed 250 posters, with a photograph of her, in police stations, shop windows, bus shelters and community halls in Bradford.

Her limited edition watch was never found.

Hundreds of DNA profiles have been examined and a number of potential suspects eliminated from the inquiry, including Crossbow Cannibal Stephen Griffiths.

Other Bradford unsolved murders to be re-examined include the murder of frail divorcee Renee McGowan, 55, who was found strangled in her 14th floor flat in Evans Towers, off Manchester Road, on July 23, 1975. She was found partly clothed and with her wrists tied behind her back.

The team is also looking at the murder of Bradford prostitute Yvonne Fitt, 33, of Manningham, whose decomposing body was found in a shallow grave at Norwood Edge, near Otley, in September 1992.

She had died from multiple stab wounds.

She was thought to have been buried for at least four months before her body was discovered meaning she had to be identified by medical records and X-rays.

Another case to be reviewed is that of Sultan Mahmood, a 30-year-old taxi driver, who was found stabbed and burned almost beyond recognition on wasteland in Dryden Street, off Wakefield Road, Bradford, in February 1979.

A man was tried for his murder but acquitted by a jury in 1983.

The cold case team has been boosted by 35 new investigators to help crack historic unsolved murders and serious sexual assaults.

Anyone with information is asked to contact the Protective Services (Crime) Department on 101, or Crimestoppers, anonymously, on 0800 555 111.