Cindy Masonwells, 33, with her partner Scott Maitland, 35. Photo: Supplied
A far north Queensland mechanic who murdered two customers over a financial dispute has been sentenced to life behind bars.
Brandon MacGowan, 43, was found guilty in the Supreme Court in Cairns on Friday of murdering Mount Isa couple Scott Maitland and Cindy Masonwells in 2012.
Justice Jim Henry sentenced MacGowan to life in jail for both of the murders and ordered he not be eligible for parole for 30 years.
The court heard MacGowan killed the couple over a long-standing dispute over $14,000 worth of restoration work he'd agreed to carry out on a van but failed to do so.
The couple flew to Cairns from Mount Isa on July 5, 2012, to collect the van.
MacGowan collected the pair from the airport that evening before shooting Mr Maitland in the back of the head and stabbing Ms Masonwells to death.
He then dumped their bodies in scrub near Cairns.
Their severely decomposed bodies were found on July 12, 2012, several days after they were reported missing by a friend.
Justice Henry called MacGowan a wicked, calculated and callous man.
He said MacGowan was under mounting pressure because he had spent the couple's $14,000 they'd paid him to carry out the work on their "beloved" panel van but hadn't carried out the work.
"You chose to solve this problem by killing Scott and Cindy," he told MacGowan.
"You shot Mr Maitland in the head and you stabbed Ms Masonwells in the back."
Justice Henry said the "execution style" killings were planned and were carried out by MacGowan to solve "a mere financial problem".
He sentenced MacGowan to two life sentences with a non-parole period of 30 years.