The Department of Homeland Security Office of Inspector General was established along with the Department of Homeland Security itself in 2002 by the Homeland Security Act. Its website describes its mission as "supervis[ing] independent audits, investigations, and inspections of the programs and operations of DHS, and recommends ways for DHS to carry out its responsibilities in the most effective, efficient, and economical manner possible."[1]
^"What We Do". OIG website. Retrieved March 21, 2016.