Cambridgeshire Police are searching a number of properties in March and Wisbech after two men were arrested on suspicion of murdering the 86-year-old.
The arrests come a month after the investigation was re-launched with a fresh team of detectives from the Bedfordshire, Cambridgeshire and Hertfordshire Major Crime Unit. The renewed appeal led to several people coming forward with information.
"We have really been encouraged by the response from the public so far.
"We believe there are people out there with information who we haven't spoken to and I would urge them to call police."
More top news
A 41 year old woman arrested in connection with a number of suspected drugs overdoses in Bury St Edmunds has been bailed by police.
Norwich midfielder Alex Tettey says that the Canaries could have already been promoted had Alex Neil been in charge for the whole season.
Find out how it's looking for the Bank Holiday Weekend