A $250,000 reward was offered for information about a deliberately lit unit fire that killed 81-year-old retired businessman John Flamish in Sydney five years ago.
Emergency services found Mr Flamish in a car park when they were called to the fire in June 2017 at a unit block on Early Street, Parramatta.
He died shortly after being taken to Westmead Hospital.
Mr Flamish had been staying with a friend who lives in the complex and was believed to have been attempting to extinguish the fire.
Detective Superintendent Danny Doherty said all available evidence was being re-examined to identify those responsible.
“The person/s involved in lighting this fire, cost a much-loved father and friend his life – and it is time that they are held responsible for their actions,” Det Supt Doherty said in a police statement early on Sunday.
Mr Flamish’s daughter, Jenny Clarke, said her family would never give up in the search for the person responsible for his death.
“My father was a retired and respected businessman who loved his family and life in general but was tragically in the wrong place at the wrong time,” Ms Clarke said in the statement.
“Ever since dad died my family has been dealing with immeasurable pain, and I am pleading with anyone who may know about the events which led to his death to come forward.”