IA4

Internal Affairs, Unit 4 (IA4) is one of three anticorruption/professional standards units in the British Columbia Provincial Police (BCPP), part of the BCPP's Directorate of Internal Affairs. Its commanding officer is Chief Superintendent Andrew Parker. It is the second-largest of the three operational units of Internal Affairs by number of personnel, and has its headquarters on the 10th and 11th floors of Marpole Station in Vancouver.

In addition to its professional standards/anticorruption investigational responsibilities, IA4 maintains the BCPP's principal confidential informant (CHIS) program, which includes recruiting, training and compensating informants, providing safe houses, required documents and mission equipment, and operating a vast decoy system.