IA-4

Internal Affairs, Unit 4 (IA-4) is one of three anticorruption/professional standards units in the Lower Mainland Constabulary's Directorate of Internal Affairs. Its commanding officer is Superintendent Andrew Parker. It is the smallest of the three operational units of Internal Affairs, and is headquartered at Marpole Station.

In addition to its anticorruption responsibilities, the unit also handles a significant portion of the Lower Mainland Constabulary's confidential informant (CHIS) program.