An injured man seen walking along a Gold Coast road has been called a “person of interest” in the double murder of a bikie and a man found dead after a mysterious car crash.

Comanchero Shane Ross, founder of Monstr Clothing, was last seen with Cameron Martin and two other men at a Pimpama tavern about 7pm on Friday.

They had met for drinks before Ross and Martin left in a dark coloured vehicle for a meeting in a Tallebudgera park.

Two hours later, Martin, 47, who had changed cars, was dead after his white Mercedes Benz smashed into a tree at Tallebudgera.

Police said 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 at the Tallebudgera park.

He had a gunshot wound to the head, but it is not yet known when he died.

Witnesses reported the injured third man was seen in the area of the crash and police have described him as a person of interest.

BIKIE MURDER: Police are playing down fears of a bikie turf war, as they launch a double murder investigation on the Gold Coast. Comanchero Shane Ross's body was found in bushland, days after his mate was discovered slumped in the wreckage of a nearby car | @MatthewamHoward pic.twitter.com/hoKuVeeGKn

— 10 News First Queensland (@10NewsFirstQLD) October 22, 2019

It is 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.”

Police are appealing for anyone with dashcam footage or information to contact detectives.

-AAP