He had admitted killing the couple but denied murder charges on the grounds of diminished responsibility and provocation.
Cole had met Miss Ovis and Mr Crompton when they were all patients at the Mid-Wales (Psychiatric) Hospital in Talgarth. He formed a sexual relationship with the woman and became "infatuated" by her, the court heard. But she called off the meetings and began seeing Mr Crompton.
Cole stabbed the couple to death after he apparently discovered them having sex.
He rained blows down upon the couple, put a tape recorder through the letter box of the bungalow where they were meeting and "flipped" when it recorded moans and groans.Reuse content