Inspector General

In the United States, an Inspector General (IG) leads an organization charged with examining the actions of a government agency, military organization, or military contractor as a general auditor of their operations to ensure they are operating in compliance with generally established policies of the government, to audit the effectiveness of security procedures, or to discover the possibility of misconduct, waste, fraud, theft, or certain types of criminal activity by individuals or groups related to the agency's operation, usually involving some misuse of the organization's funds or credit. In the United States, there are numerous Offices of Inspector General (OIGs) at the federal, state, and local levels.

http://en.wikipedia.org/wiki/Inspector_General#United_States