AC-3

Anticorruption Directorate, Unit 3 (codename: AC-3) is one of three official professional standards units of the Lower Mainland Constabulary (LMC), the territorial police force responsible for the seven counties of the Metro Vancouver and surrounding Lower Mainland regions. AC-3 is the second-largest of the directorate's three units, after AC-5, and while fully empowered to investigate alleged bribery and corruption within all areas of the constabulary, is primarily responsible for operating the constabulary's Witness Protection & Relocation Program.

Along with AC-4, AC-3 has its offices at Nelsons Court Station in New Westminster. The current commanding officer of AC-3 is Superintendent Alice Nguyen.