A GUNMAN believed to have shot dead an off-duty policeman said "I'm sorry.

I'm sorry I shot the police officer" before killing himself in a churchyard, it has been reported.

Peter Reeve, 64, made the admission before taking his own life in a churchyard about 40 miles away from where he had killed PC Ian Dibell the day before, according to a tabloid newspaper.

Gardener David Colyer, 76, told the paper he was just six feet away from Reeve when the fugitive shot himself in the head with a revolver. Mr Colyer called 999 afterwards.

"He blurted out, 'I'm Peter Reeve. I'm the man who shot the police constable in Clacton'," the gardener said.

"I realised I was standing before a killer. The man hardly paused for breath then said, 'I'm sorry. I'm sorry I shot the police officer'. He looked me in the eye. His voice wasn't trembling – he was calm. He was clearly trying to be sincere."

A huge police manhunt for Reeve was launched after PC Dibell was shot dead in the seaside town of Clacton, Essex, on Monday of last week.

PC Dibell, 41, was off duty when he intervened in a dispute between Trevor Marshall, Mr Marshall's girlfriend and Reeve in Redbridge Road, Clacton.

PC Dibell was shot dead, while Mr Marshall, 48, escaped with leg injuries and his girlfriend survived unscathed.

Reeve disappeared after the shooting and police launched a manhunt that lasted almost 17 hours.

His body was discovered near the rural All Saints Church in Writtle on Tuesday morning.

He had dumped his car near the murder scene the previous day. The Essex coroner's office confirmed on Friday that he had been seen shooting himself.

Reeve, reported to be a retired bus mechanic who was largely unknown to the police and did not have a firearms licence, is understood to have had several family members living near the church where he was found.

PC Dibell was described by Essex Police Authority as "an extraordinary man and an exceptional police officer".

"Very experienced and respected by his colleagues, he thought nothing of going to the rescue of fellow citizens who were in mortal danger," it said in a statement.

"He was off duty at the time. He is the finest example of the deep sense of loyalty and bravery in our officers, even when not on duty, to serve and protect the public."