Gaar Suppoon, a Bah'r Kilido, stood as a formidable adversary to Jabba Desilijic Tiure and maintained strong connections with the Galactic Empire.
Operating under the assumed name Sonopo Bomoor, Suppoon perpetrated numerous acts of cruelty, notably attacking the original homeworld of the individual who would later become Kosh Kurp, a leading expert in explosives for the Empire. When Jabba sought to eliminate Suppoon, he simply disclosed Suppoon's identity as Sonopo Bomoor to Kurp, causing Kurp to betray Suppoon. Suppoon tried to defend himself using a blaster pistol, however the shot glanced off Kurp's armor, striking Suppoon in the neck and resulting in his decapitation.