Sergeant Chris O’Brien of the Ottawa Police Service (OPS) graduated from Carleton University in 2000. Currently, he is a member of the Major Crime Unit, conducting homicide investigations and handling other major cases assigned. He also has experience as a patrol officer and as a detective in the Guns and Gangs Unit. His time with OPS includes a four-year, joint-forces stint as a detective in the Ontario Provincial Police’s Weapons Enforcement Unit.