Peter Sutcliffe was locked up for life in 1981 for the brutal murders of 13 women, but one mystery still remained - who WAS the cruel hoaxer behind the 'Wearside Jack' tape, which derailed the police investigation and led to three more women dying at the Yorkshire Ripper’s hands? Award-winning Daily Mail crime writer Stephen Wright speaks to retired Detective Chief Superintendent Chris Gregg, whose team unearthed a crucial clue more than two decades on.

<p>Peter Sutcliffe was locked up for life in 1981 for the brutal murders of 13 women, but one mystery still remained - who WAS the cruel hoaxer behind the 'Wearside Jack' tape, which derailed the police investigation and led to three more women dying at the Yorkshire Ripper&rsquo;s hands? Award-winning Daily Mail crime writer Stephen Wright speaks to retired Detective Chief Superintendent Chris Gregg, whose team unearthed a crucial clue more than two decades on.</p>

Award-winning Daily Mail crime writer Stephen Wright talks to top detectives, lawyers, victims and relatives to take an in-depth look at crimes that have shocked Britain (and the world), as well as revisiting some of his landmark stories and campaigns. From serial murderers to child killers, ruthless gangsters to corrupt police, psychopaths to paedophiles, celebrity criminals to audacious conmen, he untangles the mysteries and the secrets behind the headlines.

<p>Award-winning Daily Mail crime writer Stephen Wright talks to top detectives, lawyers, victims and relatives to take an in-depth look at crimes that have shocked Britain (and the world), as well as revisiting some of his landmark stories and campaigns. From serial murderers to child killers, ruthless gangsters to corrupt police, psychopaths to paedophiles, celebrity criminals to audacious conmen, he untangles the mysteries and the secrets behind the headlines.</p>

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