AND YES, THERE IS NO STATUTE OF LIMITATIONS

NOTE: THE UNITED STATES HAS NOT SIGNED THIS DECLARATION.

Convention on the Non-Applicability of Statutory Limitations
to War Crimes and Crimes Against Humanity
Adopted and opened for signature, ratification and accession by
General Assembly resolution 2391 (XXIII) of 26 November 1968
entry into force 11 November 1970, in accordance with article VIII

Article 1

No statutory limitation shall apply to the following crimes, irrespective of the date of their commission:

(a) War crimes as they are defined in the Charter of the International Military Tribunal, Nurnberg, of 8 August 1945 and confirmed by resolutions 3 (1) of 13 February 1946 and 95 (I) of 11 December 1946 of the General Assembly of the United Nations, particularly the "grave breaches" enumerated in the Geneva Conventions of 12 August 1949 for the protection of war victims;