Detectives investigating the death of 87-year-old John Kerr at Noosa Heads on June 18 are calling for further witnesses to come forward.
They have released footage of a man and three vehicles from the area at the time.
The man and the occupants of the vehicles are considered to be possible witnesses. Investigators do not believe they are connected to any of the persons involved in the homicide but may be able to provide vital information.
Officers believe the man walked along a pathway near the crime scene at 6am on the morning of the attack, while the vehicles shown, a white Toyota hatchback, a green Holden hatchback, and a dark-coloured sedan, were driven along Hastings Street before the incident.
They are appealing to the man and people inside those vehicles, who could be interstate tourists, to contact police.
