John Cooper
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John Cooper's mass murder denial in police interview

John Cooper, 66, has been convicted of two double killings in Pembrokeshire in the 1980s.

He shot dead brother and sister Richard and Helen Thomas at their home in 1985.

In 1989 he ambushed and murdered Oxfordshire couple Peter and Gwenda Dixon as they walked on the Pembrokeshire coastal path.

But during his police interviews, he continued to claim he was an innocent man.