25 September 2012 Last updated at 08:55 ET

Chittering murder: Police divers search River Cam

Llywelyn Thomas had retired to Cambridgeshire to be near his family

Police divers are searching a river in connection with the murder of a pensioner in Cambridgeshire last year.

Llywelyn Thomas, 76, was found dead at his Chittering home on 18 December.

A spokesman for Cambridgeshire Police said divers were searching the River Cam at Fen Ditton for "evidence that might help with the investigation".

Detectives believe Mr Thomas, a retired farmer who had moved to the area from south Wales 12 years earlier, was killed during a burglary.

Four men arrested in connection with the murder remain on bail.

Post-mortem tests found Mr Thomas died from face and head injuries which may have been inflicted with a poker.

The police spokesman confirmed detectives were still looking for items believed to have been taken during the incident, including three "distinctive" watches - a Seiko Bell-Matic, a boxed Tag Heuer and a copied Breitling, a leather horseshoe wallet and a collection of coins.

Rewards totalling £50,000 have been offered for information leading to the conviction of those responsible.