Photograph of Peter Sutcliffe an English serial killer who was dubbed the 'Yorkshire Ripper' by the press
Sutcliffe, who lived in Bradford, West Yorkshire, believed he was on a 'mission from God' to kill prostitutes, although not all his victims were.
His other victims, aged between 16 and 47, included two university students, a civil servant, a bank clerk and a supermarket worker.
Sutcliffe was dubbed the Yorkshire Ripper because he mutilated his victims using a screw driver, hammer and knife.
He was also convicted of seven counts of attempted murder in and around Yorkshire, Lancashire and Greater Manchester.
Timeline:
Summer 1975: Peter Sutcliffe begins attacking women, two in Keighley and one in Halifax. All three survive and police do not link the attacks.
30 October 1975: Sutcliffe carries out his first fatal attack on Wilma McCann, a 28-year-old prostitute from the Chapeltown district of Leeds.
20 January 1976: He murders Emily Jackson, 42, from Leeds, battering her with a hammer and stabbing her with a screwdriver.
5 February 1977: He kills Irene Richardson, 28, another prostitute from Leeds.
23 April 1977: Sutcliffe strikes for the first time in his home town of Bradford, murdering 32-year-old Patricia Atkinson.
26 June 1977: The case comes to the attention of the national press after Sutcliffe murders Jayne MacDonald, a 16-year-old shop assistant. The murder, and the realisation that a serial killer is on the loose in Yorkshire, shocks the country.
The attacker is dubbed the Yorkshire Ripper by the press, and West Yorkshire Chief Constable Ronald Gregory appoints his most senior detective, Assistant Chief Constable George Oldfield, to investigate the murders.
1 October 1977: Sutcliffe chooses Manchester for his next attack - on Jean Jordan, 20. He dumps her body on an allotment and throws her bag, containing a brand new £5 note he gave her, into nearby shrubs.
Police find the bag and trace the serial number on the note back to the payroll of Yorkshire hauliers T and W H Clark, who employ Peter Sutcliffe.
Sutcliffe is interviewed by police but provides an alibi placing him at a party.
21 January to 16 May 1978: Sutcliffe murders three prostitutes - Yvonne Pearson, 21, from Bradford; Helen Rytka, 18, from
