00:00Two of Wales' most baffling crimes.
00:02Decades on, these two double murders are being reinvestigated.
00:06We think one man did all four murders.
00:09John William Cooper.
00:11Gossip has put Cooper in the frame for 101 offenses.
00:15If he did do these murders, he is a serial killer.
00:19Cooper's been granted parole.
00:21Welcome home, love.
00:27What?
00:31If we reinvestigate and it doesn't go our way,
00:34you could lose everything.
00:36I don't like people referring to him as my father.
00:39Men like him, they always kill again.
00:43They have no idea who they're dealing with.
00:45Three days, get inside his head.
00:47It's like a ticking time bomb.
00:50Brand new drama across three nights,
00:53The Pembrokeshire Murders starts Monday the 11th of January
00:56on ITV and ITV Hub.
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