Andrew Heath died in a fire, started deliberately, at his home in Warndon, Worcester, in December last year.
Police say the fire was started in a wheelie bin in the porch outside the 52-year-old's front door in Chedworth Close.
Andrew came out as gay aged 18 and had lived in Worcester for many years.
Prior to moving to Worcester, he had a history of sexual offending - five convictions for gross indecency and indecent assault offences that occurred between 1984 and 1999 in Leicester and Birmingham.
His offending was against teenage boys between the ages of 14 and 17 - some victims were men over 16 - but the offences occurred before the age of consent was reduced to 16-years-old in 2000.
– Paul Williamson, Detective Superintendent, West Mercia Police
"Mr Heath died in a terrible way and his family have been left in limbo not knowing what happened to him or why. The person responsible is still out there on our streets and needs to be caught."