Police investigating the deaths of two men on the Gold Coast as double murder are hunting for an injured man seen walking along a roadside as a "person of interest".
Comanchero Shane Ross, founder of Monstr Clothing, was last seen with friend and car enthusiast Cameron Martin at a Pimpama tavern about 7pm on Friday.
They had met with a number of people there before leaving in a dark coloured vehicle to join a gathering in a Tallebudgera park.
Two hours later, Martin, 47, who had changed cars, was dead after his white Mercedes Benz smashed into a tree.
He had sustained a "highly suspicious" puncture wound to his chest shortly before the crash.
Ross was reported missing on Sunday before his body was found by friends in long grass on Monday near the corner of the Pacific Highway and Tallebudgera Creek Road.
He had a gunshot wound to the head. It is not yet known when he died.
It is also not known if Martin was in the park with Ross, 36, when he was killed or if he witnessed the shooting, but police believe the deaths are connected.
"Earlier in the evening they were together and they have both been found dead within a kilometre and a half of each other; it is being treated as a double murder investigation," Regional Crime Co-ordinator Kerry Johnson said.
He said the deaths were a "contained incident" and there was no risk to the public.
"I would suggest in one way or another that these people were known to each other."
Divers were searching on Tuesday for a weapon in Tallebudgera Creek near where Ross' body was found.
Witnesses have told police of an injured man walking along the side of Tallebudgera Creek Road around the time of Friday's crash. It has prompted speculation he was somehow involved or that the accident may have been staged.
Police are trying to establish a timeline of the men's movements leading up to the meeting in the park and the accident.
Both were known to police and officers are trying to establish a motive, probing Ross's underworld links and criminal past.
Last week, the heavily tattooed bikie escaped jail after pleading guilty in a NSW court for his role in a major fraud racket.
The court was told Ross was a major player in a $4.5 million syndicate that used fake documents to secure loans for a fleet of luxury vehicles, which were later sold.
He pleaded guilty to three counts of dealing with the property proceeds of crime and dishonestly obtaining property by deception.
Post mortem examinations will be carried out on both men.
Supt Johnson appealed for anyone with CCTV or dashcam footage to contact investigators - particularly if it shows an injured man in the vicinity of the accident.