Along with Korris and Kunivas, he stole the Batris, a Talarian freighter, and was involved in the destruction of the IKS T'Acog. Rescued from the damaged freighter by the USS Enterprise-D, he set about trying to convince Lieutenant Worf to join him and Korris in their attempts to engage in "glorious battles".
When Captain Jean-Luc Picard learned of their status as criminals, he ordered them to be arrested and put in the brig. Konmel and Korris made a phaser from parts concealed in their uniforms, and attempted a breakout. However, Konmel was killed in the escape attempt. (TNG: "Heart of Glory")