THE brother of PC Patrick Dunne, the ex-Bolton teacher who was gunned down more than 14 years ago, said yesterday he does not expect all those involved in the attack to be brought to justice.

PC Dunne died from a single shot to the chest after he stumbled across the doorstep murder of another man.

Gangster Gary Nelson was jailed for a minimum of 35 years last January after being convicted of both murders.

But police believe two more men were involved in the attack in Clapham, south London, in 1993.

Mr Dunne's widow Joy and several other family members received the Metropolitan Police's highest honour, a high commendation, on his behalf at New Scotland Yard yesterday.

But the officer's brother, Ivan Dunne, said he does not believe the other two men will ever be caught.

He said: "To be honest, we were more concerned with the person who killed Patrick and that is the person they have got.

"He was always the main suspect and we are quite happy with the conviction.

William Danso, aged 31, died in a hail of bullets on his doorstep when he was confronted by three black men.

Former Deane High School maths teacher PC Dunne, who moved to London in 1986 after the death of his father and joined the police three years later, was attending an incident in the house opposite when he heard gunfire.

The 45-year-old who rode a bicycle and worked as a community officer ran outside but he was shot once in the chest. Three men, including Nelson, were charged with murder in November 1993, but the cases were discontinued due to lack of evidence.

A breakthrough came in the second investigation when a man who had been in Wormwood Scrubs with Nelson in 1994 said he confessed.

PC Dunne joined the staff at the former Deane High School in 1971 and taught maths. He was later appointed head of year.