Co-offender Tye Wayne Porter, 20, also faced sentencing after pleading guilty to manslaughter.
Cook said Porter and the teen “left Mr Cabrie for dead” beside the road and fled in the Uber driver’s blue Nissan X-Trail SUV.
The teen later placed the pair’s knives in the SUV before setting it on fire.
The teen and Porter also pleaded guilty to unlawful use of a motor vehicle, arson and armed robbery.
Cook said Porter had been drinking and smoking cannabis with the teen, who suggested they steal a car.
After Cabrie drove the teens to a residence at 11.30pm, they returned with knives and demanded his mobile phones before pushing him into the SUV’s caged cargo area.
The teen and Porter drove to the boat ramp then stabbed Cabrie when he was inside the SUV.
Cabrie was able to get out and run before falling and suffering a seventh and fatal stab wound from the teen.
Cook said the teen should be sentenced to between 20 and 22 years in detention as Davis could find the killing “particularly heinous”.
He said Porter should be imprisoned for 11 to 12 years with a requirement he serve a minimum of 80 per cent of the sentence in custody.
The teen’s barrister Charlotte Smith said her client should serve 10 to 12 years as the murder was not premeditated.
“He was deeply affected by the victim impact statements,” Smith said.
Davis warned Cabrie’s numerous family and supporters in court he would not reach a decision on the “complex” matter on Tuesday.
Sentencing has been adjourned to a date yet to be fixed.
AAP
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