The man being questioned over the disappearance of missing Victorian campers Carol Clay and Russell Hill has been identified as a senior airline pilot.
Gregory Lynn was arrested in a dramatic confrontation when heavily armed police were dropped into his high country campsite in Licola by helicopter on Monday.
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The 55-year-old’s vehicle was also seized.
Mr Lynn, who is currently a Jetstar captain, was tracked leaving his Caroline Springs home on Monday, travelling more than 230km to Licola.
Police, who sought information about the vehicle just a week ago, allege it was painted from blue to beige to avoid detection.
The Nissan Patrol, which was seen leaving the burnt-out campsite at the time of the couple’s disappearance, led detectives to Lynn.
The four-wheel-drive is now a key piece of evidence in the investigation.
Everything inside the vehicle has been seized and will now be taken away for forensic examination.
Ms Clay’s sister Jill Walker said Mr Lynn’s arrest, which happened about 100km from where the campers went missing, was amazing.
“(It’s) absolutely amazing actually but scared as well,” she said.
“Because we’ve been holding this together for 20 months now … 20 months is a long time.
“It’s been an incredible shock and because it’s been such a mystery, it’s been a bit unfathomable.
“There’s no sense that there’s a reason for this.
“If this can be resolved we can then let go, have a memorial and move on. But until that happens, we can’t.”
Mr Lynn has not been charged.
Jetstar confirmed the 55-year-old has been stood down.
“Jetstar has been advised by Victoria Police that one of its employees is under investigation for a serious crime and will work to assist in this due process any way we can,” a Jetstar spokesperson told 7NEWS.com.au on Tuesday.
“As a matter of course, the employee has been removed from duty as a result of their arrest.”
Mr Hill left his Drouin home on March 19, 2020, and picked up Ms Clay from her home in Pakenham in his white Toyota Landcruiser.
He was last heard from on March 20 when he made a call via HF radio saying he was at Wonnangatta Valley in the Victorian Alps.
Ms Clay told friends she was going away and expected to return home on March 28 or 29.
Investigators have been told they were camping together at Wonnangatta River near the Wonnangatta camping ground.
Campers found Hill’s car with signs of fire damage at their campsite, which was completely destroyed by fire, near Dry River Creek Track on March 21.
The pair haven’t been seen or heard from since.
Last month, Mr Hill and Ms Clay’s families both spoke for the first time and said they had a horrible feeling of “dread” when the pair went missing.