Police believe one of Australia’s most wanted men is “hiding in plain sight” and living off cash-in-hand jobs as a labourer.

Victorian man Jonathan Dick is wanted for the murder of his brother David in Doncaster in February last year.

He is also suspected of assaulting a former friend with a hammer in a Keilor driveway in August. That 38-year-old male victim was taken to hospital with a minor laceration to the back of his head.

Victoria Police on Wednesday offered a $100,000 reward for anybody who offers him up to detectives.

Homicide Detective Inspector Tim Day said it’s believed he’s being sheltered in someone’s home or a hostel.

“We believe Jonathan is seeking shelter somewhere. It may be a hostel as opposed to sleeping rough,” Detective Inspector Day told reporters as he launched the reward.

“Given his appearance, we suspect that he is indeed living some form of normal life – certainly not sleeping rough.”

Mr Dick appears to be clean-shaven, of similar weight, and in clean clothes in CCTV taken near the Keilor assault.

“For those reasons we believe Jonathan has ready access to laundry facilities, to food supplies and money.

“Whether he’s getting food from food vans and Salvation Army or anything like that, we just don’t know. But he clearly has access to some cash.

“We’re appealing specifically to members of the construction industry. We know that Jonathan is a skilled labourer. It is possible that he may be doing some cash-in-hand work.”

Police released video footage of Mr Dick speaking at a wedding in 2007 to help members of the public recognise his voice and mannerisms.

“We believe Jonathan is currently in the community. People will be seeing him, hearing him, and possible working with him,” Detective Inspector Day said.

Police have made several public appeals for information on his whereabouts since the Doncaster murder more than 18 months ago.

Police on Wednesday re-released images of his face and two tattoos on his lower body.

One tattoo is of cartoon characters Wolverine and Sabre-tooth on his right thigh down to his knee. The second depicts the Incredible Hulk on his left calf.

Mr Dick is described as being of Caucasian appearance, aged in his 30s, about 176cm tall with a solid build and mousey brown hair.

He is only accused of being violent towards the two people known to him, but members of the public should not approach him.

Call Crime Stoppers if you have information on his whereabouts on 1800 333 000.

Call triple-0 if you see him.

Police released images of Mr Dick’s tattoos to help the public recognise him. Photo: Victoria Police