The family of a man who died in 2010 continue to urge anyone with information about his death to come forward.
It comes as Jan Hogan's family mark the eighth anniversary of his death today.
Mr Hogan's body was found in his flat in Downham Market on May 23, 2010.
Police carried out a full forensic examination of the 59-year-old father-of-five's flat in Basil Drive.
Officers also searched neighbouring properties and carried out house-to-house enquiries around the estate, which is off the town's Lynn Road.
A post mortem into Mr Hogan's death was inconclusive. Tests were carried out for the presence of any poison in his system, it was reported at the time.
An inquest into his death the following year recorded an open verdict.
But the coroner concluded that Mr Hogan did not kill himself or die from natural causes.
Last month police arrested two men, described as being aged in their 40s and 50s, in connection with his death.
Both were questioned by detectives before being released under investigation while enquiries continue.
In a statement Mr Hogan's family said: 'Today we mark another year of dad's death, a day which despite the passing of time never gets any easier.
'Dad was a loving, funny and intelligent man who never failed to provide for his family and we miss him every day.
'Recent developments in the investigation have given us renewed hope in finding answers and we would urge anyone who knows anything about his death to come forward and speak to police. Help us get justice for our dad.'
Det Insp Stuart Chapman, from the Norfolk and Suffolk Major Investigation Team, said: 'We continue to follow a number of lines of enquiry concerning Mr Hogan's death.
'I would appeal to anyone who has information regarding this – no matter how insignificant it may seem or even if you have spoken to or called us before – to come forward.'
Anyone with information concerning the case should contact the Norfolk and Suffolk Major Investigation Team on 101.
Alternatively, information can be updated directly to the major investigation public portal via the following link: https://mipp.police.uk/
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