Confidential Informant Accountability Act of 2015

Confidential Informant Accountability Act of 2015 Directs the Departments of Justice, Homeland Security, and Treasury to report biannually to Congress on: (1) all serious crimes, authorized and unauthorized, committed by informants maintained by their respective law enforcement agencies (i.e., the Federal Bureau of Investigation, the Drug Enforcement Administration, the U.S. Secret Service, U.S. Immigration and Customs Enforcement, and the Bureau of Alcohol, Tobacco, Firearms and Explosives); and (2) the amounts expended by each of such agencies on payments to such informants. Defines a "serious crime" as any serious violent felony or drug offense or any offense of racketeering, bribery, child pornography, obstruction of justice, or perjury that an agent or employee of the relevant law enforcement agency has reasonable grounds to believe an informant has committed.