Police have searched a Rebels motorcycle clubhouse in the state's north-west as investigations continue a murder at the Marrawah Tavern in July.
Simon Crisp, 44, was shot three times as he emptied rubbish bins at the tavern in the early hours of July 13.
The clubhouse was one of three properties searched in the north-west on Tuesday as part of investigations.
Police also targetted a shop at Edith Creek and a house at Roger River.
Detective Inspector Rob Gunton says police have identified a small group of people of interest.
"The investigation continues to identify the person responsible," he said.
He has confirmed a former member of the Rebels motorcycle club is being investigated.
"The Rebels clubhouse at Smithton was one of the targets of the search warrants, but there is no specific information to suggest the club is involved," he said.
"However one of the persons of interest was, until recently, a member of the Rebels."
Police say the attack on Mr Crisp was targeted and callous.
Last month, cars and items were seized for forensic testing after a home and business were searched in Marrawah.
Mr Crisp's partner and her 10-year-old daughter were inside the tavern at the time of the shooting and the trio was due to fly out for an interstate holiday.
Police say Mr Crisp's family is grieving.
Inspector Rob Gunton says police spoke with the victim's mother two days ago.
"Obviously they are eager for this to be resolved and they are obviously still devastated and saddened by the loss of a husband, partner, son and father."