More than seven years after the shooting murder of a Tasmanian man, detectives say they are closing in on the killer and hope a state-record cash reward will prompt crucial public information.
Shane Geoffrey Barker, 36, died in August 2009 at his home at Campbell Town in central Tasmania after being shot four times and police have since been hunting his killer.
Assistant Commissioner Glenn Frame on Monday said a new quarter-of-a-million dollar reward, up from $50,000, will hopefully inspire fresh information.
"This is a life-changing amount of money and provides an opportunity for someone to come forward and provide that information and hopefully resolve the matter," Mr Frame said.
Investigators believe they have already spoken with the murderer, but are missing crucial links needed to prosecute.
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"We believe there are people in the community with information that is vital to us," Mr Frame said.
Mr Barker knew his killer, the senior officer added.
"We have a number of people we are looking at ... some of them are known to each other," he said.
Detectives had previously appealed for public information about a dual cab ute captured on CCTV in Campbell Town on the night of the killing, but Mr Frame said the vehicle was no longer of interest.
A team of five detectives started a review of the case in November and the reward, which will come from the police kitty, has been approved by the state government.
"It is a lot of money but investigations are an expensive proposition as well so an investigation that takes two, three or four years with all the resources we put in ... if we can encourage someone to do this it's a reasonable return," Mr Frame said.
