A Perth drug dealer has been jailed for at least 22 years after bashing his mate to death, dismembering his body with a chainsaw and dumping it in the bush.
Gary David Jackson, 51, and his cousin Mark David Corbett, 52, beat Wade Cameron Dunn round the head with a metal pole after luring him to an Alexander Heights home in May 2015.
The pair then hacked up his body with a chainsaw and dumped it in different locations in bushland near Bindoon, northeast of Perth, while his head was kept in Jackson's ute for days.
Mr Dunn's remains have never been found, causing even more agony for his three young children and grieving mother.
The 40-year-old's family wept as details of his brutal killing were outlined at West Australian Supreme Court on Thursday.
They cheered and applauded as Jackson was sentenced to life behind bars with a minimum of 22 years for murder.
He was also given five years concurrent for conspiring to pervert the course of justice after plotting to have an ex-con break the leg of a witness in his trial.
Jackson also tried to convince his teenage son to lie to police and give him a false alibi.
He repeatedly said he wanted to "whack" Mr Dunn and pre-planned the attack against him over a $27,000 drug debt.
The pair lured him to Corbett's house, smacking the defenceless victim around the back of the head as soon as he stepped inside.
"You were the first to hit Mr Dunn using the pole and you pursued him into the garden where you continued to assault him," Justice Jeremy Allanson told Jackson.
They then dragged him back into the house and continued the brutal attack on him, even while he was either unconscious or "obviously helpless", the judge added.
"One of you hit him with the pole while the other held him down," Justice Allanson said.
They tried to cover their tracks by bleaching the inside of the house, ditching Mr Dunn's personal belongings and disposing of his body.
"You and Corbett moved Mr Dunn's body to your garage then disposed of it in bushland north of Perth," the judge said.
"You used a chainsaw to cut up the body and dispose of it in different locations."
The way the body was dealt with and disposed of magnified the hurt to Mr Dunn's family, he added.
"They first suffered the anxiety of not knowing what happened to him, then had to face the horror of what had happened and continue to suffer by not being able to put his body to rest," he said.
Corbett, who testified against Jackson in the trial, has pleaded guilty to murder and will be sentenced on Monday.
© AAP 2017