Qld grave site remains are Thompson's

Alexandra Patrikios
Qld grave site remains are Thompson's

Human remains found in bushland at Caboolture north of Brisbane have been identified as those of Queensland man Samuel Thompson.

A post-mortem had been conducted and suggests the 22-year-old was assaulted, but no cause of death has been established, police confirmed on Friday.

Mr Thompson's family has been advised of the developments.

The uncharacteristic disappearance of Mr Thompson triggered a large-scale investigation involving homicide detectives and police divers.

He was last seen driving his distinctive orange 2016 Ford Mustang through Brisbane's north on March 7.

The car was later found abandoned in northern NSW bushland.

The desperate search for Mr Thompson led police to scour bushland at both sites, and police divers and sniffer dogs have also carried out searches at North Pine River and Murrumba Downs.

Mr Thompson's family made a tearful plea to the public for information, saying "someone knows where Sam is ... please help us find our boy".

Police have charged former anti-Islamic State fighter Ashley Dyball, 25, and 23-year-old Roberto Vincenzo Boscaino with Mr Thompson's murder.