Cold Case Breakthrough: Man Charged Over 1978 QLD Triple Murder

A man has been charged over the murder of a group of young friends who went missing during a motorcycle holiday in Mount Isa more than 40 years ago.

Karen Edwards, Tim Thomson and Gordon Twaddle were just three days into their holiday when they disappeared on October 5, 1978.

Their bodies were found in bushland 12 kilometres north of Mount Isa, nearly three weeks after they were last seen leaving a caravan park in a car with another man.

Karen Edwards, Gordon Twaddle and Tim Thomson. Image: AAP/Queensland Police

All three had suffered gunshot wounds.

Now more than 40 years after their disappearance, a 63-year-old man from Goulburn has been formally charged with three counts of murder.

The charges come after police renewed calls for help from the community late last month, urging anyone who may have seen the trio at the time of their disappearance to come forward.

On Friday police said that while they have received significant information since their appeal, they were continuing to urge anyone with information to contact police.

A half a million dollar reward remains on offer for any information which leads to the conviction of the person or persons responsible for their murders.

Series Of Events

The trio left Alice Springs on October 2, 1978, on two motorbikes. Attached to one of those bikes was a home-made sidecar carrying Thomson's nine-month-old doberman dog named 'Tristie'.

A day later they met a male motorcycle enthusiast at Frewena before camping with him overnight at Barry Cave, police said.

The trio were last seen leaving the Moondarra Caravan Park. Image: Queensland Police

The following day the trio continued to travel with the man but only Edwards (23), Thomson (31) and Twaddle (21) checked into the Moondarra Caravan Park that afternoon.

The friends were last seen the following day leaving the park with a man in a Toyota Landcruiser, who had joined them at the campsite the previous night.

A day after they disappeared all of the property the group had left behind except for the sidecar has been removed from the campsite and the dog located at the Mount Isa Dump. Image: Queensland Police

They left their dog and their motorbikes behind.

According to police, later that day the same vehicle was seen returning to the park and a man was seen alone, looking for the dog.

Featured Image: AAP/Queensland Police