The Police Ombudsman's Office has appealed for information about an incident in Cookstown on the evening of 15 April 2012, during which police used CS Spray.
It happened outside licensed premises in the Molesworth Street area between 11pm and midnight, as police dealt with an argument between a number of people.
Anyone who saw what happened is asked to contact the Police Ombudsman's Office on 0800 032 7880.