A man was arrested for murdering his long-term partner after police secretly taped him apparently confessing to his cats, a jury has been told.
David Henton 'tended to talk to his pets' the court was told
David Henton, 72, who lived alone, was heard to say: "They know I did it, see," Swansea Crown Court was told.
Mr Henton, of Neath, broke a window in the back door of her home to make it look like a burglary, the court heard.
His defence questions the relevance of the tapes, and he denies murdering Joyce Sutton, 65, near Neath in 2006.
Mrs Sutton was bludgeoned to death in bed, and the court was told the investigation was a year old before police turned their attention to Mr Henton.
The couple had known each other for 30 years but lived at separate addresses. Paul Lewis QC, prosecuting, said detectives covertly installed devices in his home and his car.
He tended to talk to his pets and most of what he said was irrelevant, said Mr Lewis.
Joyce Sutton was found lying bleeding in bed, the jury heard
But on 24 January 2007, he was taped telling them: "So, I don't know what's going on. I don't know if they can prove it or anything.
"What am I going to say if they find anything?"
He added: "I did this to mummy, up there."
The following day he was taped saying: "Hi Joyce. It's Dai. They know I did it, see."
Then he said: "I'm still under suspicion. Oh my Joyce. I will get a solicitor. They know it was me.
"They had my car in and they searched it. But they have taken it again now."
Elwen Evans QC, defending, interrupted the prosecution's opening speech to question the relevance of the recordings.
"We do not accept the accuracy of the interpretation taken by the Crown," she told the court.
Mr Lewis said detectives had already taken possession of footmats from Mr Henton's car, which revealed glass fragments from the back door of Mrs Sutton's home in Skewen.
A glass panel in the door had been smashed and Mr Lewis said it appeared at first that Mrs Sutton had been murdered by a burglar.
A major police inquiry followed Mrs Sutton's murder
But, said the barrister, the fragments must have been transferred to the vehicle after the "break-in. "
"Mrs Sutton was not murdered by a random burglar but by a man she knew and trusted," he said.
Mrs Sutton recently developed depression and refused to get out of bed, the court heard, and Mr Henton ended up nursing her.
"Had she become a burden he could no longer bear?" asked the barrister.
The court was told that Mr Henton reported finding Mrs Sutton, a widow with one son, just after 0800 GMT on 11 January 2006.
Police found the back door was open and Mrs Sutton was lying bleeding in her bed.