Potential victims of theft and fraud are being urged to come forward as police probe an agency.
Leonard Peters, in Westcliff, Essex, closed suddenly earlier this year.
Police had been investigating the theft of money, and made an arrest in August.
The 41-year-old man has since been released, but police have now released further information on the investigation in a bid to get more victims to come forward to pursue a prosecution.
An allegation is that tens of thousands of pounds were taken from a bank account belonging to elderly residents.
A spokesman for Essex Police said: “Detectives in the south of the county are investigating multiple allegations of theft and fraud related to property management in Thorpe Bay and the surrounding area.
“We are appealing for anyone with information about these offences to come forward and assist with our enquiries.