Yorkshire Ripper Peter Sutcliffe, from Bradford, now 59, was jailed for life in 1981 for the murder of 13 women.

BBC: NEWS | UK | England | West Yorkshire | Man still held over Ripper hoax

In the early hours of Thursday, 30 October 1975 she became the first victim of the Peter Sutcliffe, the Yorkshire Ripper.

BBC: Yorkshire Ripper victim's son rejects hanging

Detectives believed the messages - which boasted about how police had failed to capture the serial killer - were genuine and diverted attention to Wearside, away from the real murderer, Bradford's Peter Sutcliffe.

BBC: NEWS | UK | England | Hunt ended for 'Ripper' hoaxer

Peter William Sutcliffe, of 6 Garden Lane, Bradford, is accused of murdering 20-year-old university student Jacqueline Hill, who was killed in Leeds seven weeks ago.

BBC: 1981: Man arrested for Ripper murders