Robert Grove
From Halopedia, the Halo wiki
Robert Grove was a corporal in the UNSC Marine Corps. He was an officer of the Elysium City Law Enforcement before joining the Marine Corps. As a law enforcement officer, he used the DTM/Law Enforcement and was later interviewed for comments about the M90 Close Assault Weapon System. Though satisfied with the weapon's adjustable stock, he voiced his fondness for the DTM/LE.[1]
