From the Document: "During this reporting period, DHS OIG [Office of the Inspector General] completed audits, inspections and evaluations, and investigations to promote economy, efficiency, effectiveness, and integrity in the Department's programs and operations. Audits provide essential transparency over DHS-level programs and operations and are concentrated in promoting effective governance and accountability across the DHS, ensuring taxpayer funds are used effectively and efficiently. Inspections and evaluations provide systematic and independent assessments of the design, implementation, and results of DHS operations, programs, and policies to determine their efficiency, effectiveness, impact, and sustainability. They may include reviews of high-profile or particularly sensitive matters. Investigations address alleged violations of law that impact the DHS's programs, operations, facilities, and personnel. Priority is given to investigations of suspected violations of criminal and civil statutes. Investigators work closely with prosecutors and other law enforcement organizations."
Department of Homeland Security Office of Inspector General: https://www.oig.dhs.gov/