A judge has found Hamilton police officer not guilty of unreasonable use of force in a July 2012 confrontation with a teenage male.

Ontario’s Special Investigation Unit investigated the confrontation in which a 16-year-old was injured while in police custody and later charged Const. Ryan Gagnon with unlawful or unnecessary use of force.

 On the afternoon of July 22, 2012, a teen was arrested, taken to the police station and put in a cell, the SIU said in a release.

After what the SIU has described as "an interaction in the cell between the male and an officer," the boy was treated at Hamilton General Hospital for a broken tooth and a facial injury.

On Thursday, a judge with the Ontario Court of Justice acquitted Gagnon in the case, ruling that officer had not used unreasonable force.

Justice Ian Cowan’s decision comes after a two-day trial in October in a Brampton court. 

The SIU is called in whenever police officers are involved in incidents in which someone has been seriously injured, dies or alleges sexual assault.