Police are wishing to speak with a man and woman who may have driven past the site of the Biggenden shed fire around the time of the incident.
Detectives from the Maryborough Criminal Investigation Branch put a call out on 29 December for public assistance to help identify three witnesses as investigations continued into the deaths of Todd Mooney and his daughter Kirra.
Police released CCTV images of three people taken at the Ban Ban Springs BP Service Station, corner of Isis Highway and Burnett Highway between 11.50am and 12.20pm on Tuesday, 20 December.
The three, a man on his own, and a man and woman travelling together, have no link to the deceased but may have information for the investigation with police urgently appealing for them to come forward.
The elderly man driving a utility has since made contact with police, but detectives are still urging for the man and woman travelling together to come forward.
Around 12.30pm a man and woman, in a white Nissan Patrol, arrived at the service station on 20 December, entering the store. Police also urgently wish to speak to both of them.
Detectives are also appealing for any motorists travelling along the Isis Highway between Goomeri and Biggenden between 11am and 1pm on 20 December, and anyone who was at the Ban Ban Springs BP Service Station between those same times to urgently contact police.
READ MORE on the Biggenden homicide here: https://burnetttoday.com.au/news/2022/12/30/double-tragedy-now-a-homicide/
