Police are continuing to review historical unsolved cases linked to the Yorkshire Ripper in a 1982 report.
The Byford Report revealed that
Peter Sutcliffe, who was given 20 life terms for murdering 13 women and attempting to kill seven more, could have been responsible for a further 13 offences.
The Sun newspaper has claimed that Sutcliffe, who now goes by the name Peter Coonan, has been interviewed in prison about 17 unsolved cases.
West Yorkshire police said they could not comment on who detectives had spoken to in the course of an ongoing investigation.
Last year, the force said officers had visited a small number of people named in the Byford Report.
In a statement, police said: “The report, when published in the early 1980s, listed 13 offences.
“These offences form part of the historic cases that continue to be reviewed by West Yorkshire Police.
“Officers did take updated statements from them and those statements from part of the review process which is ongoing.
“West Yorkshire police continue to keep an open and objective mind on all these investigations.”
In a later statement, the force added: “West Yorkshire police are continuing with an ongoing process to review non-recent undetected offences in line with national guidance around the handling of information and in conjunction with the Home Office under the requirements of the Public Records Act.”
The inquiry into the police investigation, by former inspector of constabulary Sir Lawrence Byford, was published in 1982 but made public only in 2006.
It said there was an “unexplained lull” in Sutcliffe’s criminal activities between 1969 when he first came to police attention and the first officially recognised Ripper assault in 1975.
The report said: “We feel it is highly improbable that the crimes in respect of which Sutcliffe has been charged and convicted are the only ones attributable to him.
“This feeling is reinforced by examining the details of a number of assaults on women since 1969 which, in some ways, clearly fall into the established pattern of Sutcliffe’s overall modus-operandi.”
Sutcliffe, 70, a former lorry driver from Bradford, was jailed for murdering and attacking women between 1976 and 1981.
Most of his victims were prostitutes who were mutilated and beaten to
Sutcliffe, who was diagnosed with paranoid schizophrenia following his life sentence, was moved from Broadmoor psychiatric hospital to Frankland Prison, in Durham, last year. PA