Thunder Bay Police Constable Andrew Johnstone is not guilty of assault. A judge has ruled Johnstone didn't use excessive force in helping control a suspect at the Balmoral police station one year ago. Police Association spokesperson Jim Glena blasted the province's civilian police watchdog for bringing up the charge in the first place. He says the Special Investigations Unit has once again overstepped its grounds. Meantime city police say an internal review of the incident will be conducted to go over procedures