Prosecutors allege convicted criminal Glen Roland Dunstall, 48, shot John Gasovski in the back of the head at close range at The Lookout, on the Illawarra escarpment on June 9 last year.

The killing is alleged to have been thoroughly planned by Dunstall in a bid to cover up the fabricated drug deal involving himself and Mr Gasovski's boss, referred to in court documents only as Witness A (WA). Mr Gasovski’s body was found by a park ranger on June 15, six days after he left his Arncliffe home.

Prosecution documents tendered to a Wollongong court during Dunstall's bail application yesterday reveal publicly for the first time the police case against the interstate truck driver, which centres on his relationship with WA.

The duo stayed in contact after their release from prison, with Dunstall offering to source cheap cannabis for WA in 2014 after learning WA had a $300,000 drug debt to pay. WA agreed to buy 200 pounds "if the price was right". Mr Gasovski and another associate visited Dunstall's home twice to deliver a phone from WA and pay $30,000 up-front for the cannabis

WA then allegedly arranged for Dunstall and Mr Gasovski to pick up the cannabis from Canberra on June 9, with the two couriers to meet at a truck stop south of Sutton Forest at 9pm that night.

Neither man was heard from during the next three hours, until Dunstall texted WA at 12.26am from Pheasants Nest saying Mr Gasovski was "on his way with 300 pounds of cannabis and one litre of cannabis oil", but claimed Mr Gasovski couldn't be contacted as he'd left his mobile phone in Dunstall's truck.

However, police will allege Dunstall was lying on both accounts, and that Mr Gasovski was dead, having been shot by Dunstall. Police will allege Dunstall planned Mr Gasovski's death to cover up the fact that there was no cannabis, and the whole drug deal had been fabricated to dupe WA into giving Dunstall $300,000.