From Halopedia, the Halo wiki
Sergeant B. Wright was an Orbital Drop Shock Trooper that was stationed at Carter Guard Armory in early January of 2550. Wright was killed when the armory was raided by the Banished at that time. Footage from Wright's helmet recorder and corroborating intelligence from a captured Unggoy led the Office of Naval Intelligence to be introduced to Atriox for the first time.
Atriox seen killing ODSTs from Wright's perspective.