Serial killer and diagnosed psychopath John Cooper was sentenced to four life sentences over two double murders he committed in the 1980s.
The vile criminal, now 76, was convicted in 2011 for the double murder of siblings Richard and Helen Thomas in 1985, as well as the double murder of Peter and Gwenda Dixon in 1989.
The evil killer murdered his first victims, brother and sister Helen and Richard, at their manor house near Milford Haven. Just four years later, he ruthlessly killed Peter and Gwenda Dixon on a coastal path near Pembroke.
Cooper was also jailed for 16 years for a spate of some 30 burglaries and the Sardis robbery alone. Double murder of Richard and Helen Thomas On December 23, 1985, police found the charred remains of a
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