A "sharp implement" which cold case detectives believe might have been used to kill a man almost 30 years ago has been found.
The body of Peter Miller was found in the kitchen of his home in Camden Place, Great Yarmouth, in 1984.
He died of a single stab wound to the chest. No-one was ever charged with the 24-year-old's murder.
Police said "fresh evidence" had led to an item they believe might be the murder weapon.
Mr Miller's brother, Tony, said he hoped the new inquiry would deliver the answers he and his family need.
"My mum is now 78 and really one of my goals is to give my mum the answer before she dies," she said.
"I am confident in the action Norfolk police have taken. I don't feel I can get excited until we get a conviction.
"I'm looking forward to some answers and I feel we've got those answers out there in the local community, somebody out there knows somebody who was involved in it.
"We've had some very encouraging signs over the last few months and hopefully we will get some answers."
Forensic tests on the item are under way, police said.
Police have not stated exactly what type of item has been found.
Family members who found Peter reported a strange smell in the air when they entered Mr Miller's home. A CS aerosol canister was found inside the house lying on the floor.
It is believed that the canister had been used by either his murderer or Peter Miller as he was being assaulted, the police said.
Det Insp Gary Bloomfield, from the Joint Norfolk and Suffolk Major Investigation Team, said the discovery of the implement was an "exciting new development".
"I am confident whoever killed Peter was from the Great Yarmouth area and somebody from that community will have knowledge or suspicions as to who the murderer is," he said.