A mentally-ill man strangled a psychiatric patient because his victim had been friends with someone who abused him as a child, a court heard.

Anthony James Kirk - known as Tony - killed George Terence Bowley, on September 19 last year. Mr Bowley was found dead in the grounds of Rhodesway Upper School in Oaks Lane, Bradford.

On Monday, a jury found Kirk unfit to stand trial on a murder charge because of his mental state.

Yesterday another jury found that Kirk did commit the unlawful killing and the judge ordered Kirk to be detained indefinitely in a secure mental hospital.

Prosecutor Roger Thomas told the jury that Kirk and Mr Bowley, a voluntary patient at Lynfield Mount mental hospital, had lived in the same area of Bradford in the 1980s when Kirk was 11 or 12 years old.

At that age, the court heard Kirk was sexually abused by a man whom George Bowley knew.

Mr Thomas said: "Although Kirk was to tell police that Bowley was not involved in sexually abusing him, the loose connection Bowley had with this man seems to have been the trigger, even after all these years."

In September, on the night Mr Bowley died, he caught a bus to Bradford Interchange where he met Kirk. CCTV footage from the interchange showed Mr Bowley and Kirk boarding a bus together.

At 11.30pm that night Kirk, 25, of Freshfield Gardens, entered Bradford Central police station and told the desk officer: "I've just killed a man. I strangled him. I'll do time for it and I don't care."

He later told police he was assaulted by a man when he was nine and raped when he was 11.

He told police: "I knew him all the time and I've killed him tonight."

When asked whom he was referring to, he replied: "Jean Claude Van Damme."

The court heard on Monday how he believed Hollywood film star Van Damme to be his cousin.

Mr Bowley's killing was caught on CCTV footage from Rhodesway Upper School. Kirk told police he choked Mr Bowley with his hands around his neck.

He dragged Mr Bowley to a nearby wall and used his legs and arms to put pressure on his neck to prevent him from breathing.

Judge Sir Harry Ognall told the jury that Kirk's mental state went back to his birth and was worsened by a car accident in 1991, which left him with brain damage.