From Halopedia, the Halo wiki
Barroth earned the title of Arch Khordat for his exceptional skill behind the scope, garnering the respect of many Kig-Yar treasurehawks and raiding krewes. His reputation of holding a virtually unblemished accuracy record eventually attracted the attention of the Banished. Barroth was recruited into their ranks and initiated as a Bloodstar, with the hopes of forging him into a lethal Spartan Killer.
Serving within the Sclera of Chu'ot, Barroth participated in the Installation 07 conflict in 2560. By May 28 of that year, he was responsible for the deaths of at least 271 UNSC personnel. During this conflict, he was identified as a target of opportunity by the Weapon, who passed his information on to Spartan-II John-117. The Spartan proceeded to track down and kill both Barroth and all the Banished forces accompanying him.
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