War criminal

A war criminal is a person who violates the laws of war during a conflict and commits various heinous acts. Examples of war crimes can include torture and genocide. During the Human-Covenant War, a number of war crimes were committed, particularly by the Covenant who sought the genocide of the human race.

Notable examples of war criminals

 * Prophet of Truth - Orchestrated and led the genocide of humanity. Orchestrated the Great Schism. Attempted to fire the Halo Array and commit galaxy-wide genocide. Executed by Thel 'Vadam after being defeated during the Battle of Installation 04.
 * Prophet of Mercy - Orchestrated and led the genocide of humanity. Died after a Flood infection form was removed from his neck by John-117 during the Fall of High Charity.
 * Prophet of Regret - Orchestrated and led the genocide of humanity. Personally commanded the glassing of Charybdis IX. Attempted to have Arbiter Ripa 'Moramee use a fleet of Forerunner to destroy the human race quickly. Personally led an attack on Earth,   and attempted to fire the Halo Array to commit galaxy-wide genocide. Killed by John-117 during the Battle of Installation 05.
 * Doctor Catherine Halsey - Considered a war criminal by many in the UNSC for "committing acts likely to aid the enemy" by stealing the Beatrice, kidnapping Kelly-087 and telling Lord Hood to send more Spartans to Onyx — all with the sole intention of hiding in the shield world until the war was over, crimes for which she was arrested and imprisoned upon emerging from the shield world in 2553.

List of appearances

 * Halo 2
 * Halo 3
 * Halo: The Fall of Reach
 * Halo: First Strike
 * Halo: Contact Harvest
 * Halo: The Cole Protocol
 * Halo: Glasslands
 * Halo: Envoy