A Perth driver who chased a dirt bike rider, causing the 15-year-old to die in a crash, has been jailed for seven years.
Jude Nathan Francis, 26, was 25 km/h over the speed limit when he tailed Mitchell Chase in Aubin Grove in December 2016, causing him to look over his shoulder at the offender's Mercedes, go through a give-way sign and slam into another car.
Mitchell was thrown from the dirt bike and died in hospital the next day.
Francis wrongly suspected the boy was riding his stolen motorcycle.
When he drove up to the intersection, he saw the bike wasn't his and went home.
Prosecutors described Francis' conduct as "misguided vigilantism".
He didn't report the incident to police, although he told his parents the next day.
When officers came knocking, he confessed and was charged with three offences including manslaughter.
The father-of-one was disqualified from driving at the time of the crash, having previously driven while his licence was suspended.
Supreme Court of Western Australia Justice Bruno Fiannaca noted Francis had consistently broken traffic laws, saying driving when he shouldn't have that night was an aggravating factor.
Justice Fiannaca said a mitigating factor was Francis' co-operation with police, although he lied about his two passengers, claiming they were hitchhikers.
Outside court, Mitchell's grieving parents Wayne and Denise were surrounded by a big group of the teen's friends, and said they didn't want to give Francis any further thought.
"We want to be here, remember Mitch, represent Mitch, draw from his strength, our love of him and his love of life," Mr Chase told reporters.
Mrs Chase wept as she said he was robbed of life at too young an age.
"He had such a bright future ahead and we're devastated to have lost him but we are happy with the outcome today," she said.
"We struggle every day with the loss. Walking into an empty room or just smelling his clothes to try and feel him ...
"To know that he was so scared - that's part of my nightmares.
"We just hope that this a lesson for anybody in the future that thinks of doing anything similar."
Francis' defence counsel Michael Tudori said his client was very remorseful and was considering his options to appeal the sentence.
He will be eligible for parole after serving five years and will be banned from holding a driver's licence for three years when he is released.