22 USC 8213 - Investigations of violations of international humanitarian law

(a) In general 
The President, with the assistance of the Secretary, the Under Secretary of State for Democracy and Global Affairs, and the Ambassador-at-Large for War Crimes Issues, shall collect information regarding incidents that may constitute crimes against humanity, genocide, slavery, or other violations of international humanitarian law.
(b) Accountability 
The President shall consider what actions can be taken to ensure that any government of a country or the leaders or senior officials of such government who are responsible for crimes against humanity, genocide, slavery, or other violations of international humanitarian law identified under subsection (a) are brought to account for such crimes in an appropriately constituted tribunal.