A police officer avoided conviction despite repeatedly punching an arrested man and kneeing him in the head.
The Independent Police Conduct Authority said the the officer was repeatedly and gratuitously violent towards the man.
The 43-year-old officer was trying to arrest the man after a disorder callout in August 2018, when the man punched him.
With the help of other officers, the man was detained and taken back to the station.
During the trip, the officer repeatedly punched the man's face, kneed him in the head and shoved his face into a concrete wall, the authority found.