Leonis Murthé served as the science officer of the Azgoghk, an Imperial extermination ship, working in conjunction with Admiral Mir Tork.
Leonis Murthé, along with Admiral Tork, spearheaded a purge aimed at eliminating alien species to establish an Empire solely populated by Humans. Murthé gained infamy for his pursuit of the most agonizing and gruesome execution techniques, maximizing the duration of suffering before death. Tork even obtained a vintage lightsaber for Murthé, which became a source of great pleasure for him.
Following the Battle of Endor, in the subsequent years, Slique Brighteyes, a Gulmarid survivor, contracted Boba Fett to assassinate both Tork and Murthé. Fett accomplished this on Malicar 3 by shooting down the Azgoghk and infiltrating it. Murthé's attempt to defend himself against Fett using the lightsaber proved utterly futile, leading Fett to set Murthé ablaze. Murthé's desperate pleas for a swift demise, accompanied by his agonizing screams, were only answered when he almost surprised Fett, resulting in a fatal blaster shot to the head.