The Independent Police Conduct Authority has found an officer involved in a driving incident in Auckland that left an teenager seriously injured, broke the law.
In Mt Albert in 2007, a car driven by Constable Aaron Holmes struck a lamp post, which hit Farhat Buksh, then aged 14, on the head.
Holmes was convicted of careless use of a motor vehicle last year, and is suspended from driving until August.
He's still working as a police officer.
The IPCA has now issued a report on the case. It says the constable was driving at a speed of up to 80km in a 50km zone near a school, looking for a van that had sped away from a checkpoint.
The report says there was no justification for exceeding the speed limit as he was not engaged in a pursuit or in urgent duty.
It says he put the public at risk and was solely responsible for the crash and the injuries to the boy.
Farhat Buksh's grandmother says her grandson still suffers from what happened.
She says he still suffers from memory loss and is unable to concentrate at school.