Police have issued a fresh appeal for information following the murder of a man in West Norwood.

Ricardo Cunha, a Portuguese national who worked as a window cleaner, was shot dead shortly after 11pm on Saturday, September 11, 2010, at his flat in Pondfield House in Elder Road.

On the night he was killed, Mr Cunha and his girlfriend were watching television in their bedroom when they were disturbed by noises outside. Mr Cunha went to investigate by looking out of the living room window and was shot.

His family has been left devastated by his death.

Police have recovered an unusual gun which they believe was the murder weapon. The gun, a British made Webley mark six revolver, is thought to have been produced in 1924 and is in good condition.

Police think the gun may have been kept by someone as a keepsake for the war and it may have been taken in a burglary.

Detectives from the Metropolitan Police’s homicide and serious crime command, who are investigating, said the same gun was fired during an incident on 14 September 2010 in Picton House on the Clapham Park Estate in Brixton. No one was injured in the incident but the gun was found the following day on the estate.

Detective Chief Inspector Nick Scola from the MPS homicide and serious crime command said: "It is now a year since the Ricardo died and we want the people that have information to come forward. Someone out there knows exactly what happened that night, and they owe it to Ricardo's loved ones to come forward.

"Ricardo was a young man with no criminal past or connections. Despite taking statements from over 200 people who knew Ricardo or who lived near where he was killed the motive for his murder remains unknown."

A reward of up to £20,000 is available to anyone who can help bring Mr Cunha’s killers to justice.

Anyone who has information should call 0208 7214005, or Crimestoppers anonymously on 0800 555 111.