It’s impressive he was even functioning.

In March 2017 a Melbourne truck driver was about to end an eight year ice binge.  He didn’t mean to.  He had been swerving erratically on the Calder Freeway.  The cars ahead were slowing for roadworks that morning.  He reacted, at most, a second before he crashed into the back of boilermaker Kari-Pekka Maunus’ utility, killing the 49-year old boilermaker.  He was charged with causing death by culpable driving.

Image from here

The Crimes Act 1958 (Vic.) §318 relevantly provides that

(1) Any person who by the culpable driving of a motor vehicle causes the death of another person shall be guilty of an indictable offence and shall be liable to level 3 imprisonment (20 years maximum) or a level 3 fine or both.

(1A) The standard sentence for an offence under subsection (1) is 8 years.

(2) For the purposes of subsection (1) a person drives a motor vehicle culpably if he drives the motor vehicle … whilst under the influence of a drug to such an extent as to be incapable of having proper control of the motor vehicle.

The charge was dealt with in the Melbourne County Court. Judge Wraight imposed a sentence of six years imprisonment with a minimum term of four years

Director of Public Prosecutions v Templeton (2018) Herald Sun, 2 June 2018, p.31.