Susanna Reid explores a cold case enquiry into one of Britain’s most prolific serial killers. The film reveals the extraordinary game of cat and and mouse that Pembrokeshire detectives waged against the man they suspected had brutally murdered at least four people. He had eluded them for 20 years, but how would new forensics methods, and a fresh team of local detectives, now crack a case that had twice run cold?
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The cast
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