Tarin, a Human, oversaw the creation of FEX-M3 nerve gas grenades throughout the Clone Wars. To ensure the order's timely completion, Reep Tonith menaced him with exposure to Dooku. Subsequently, Sergeant Marrt placed him in shackles as the Czerka factory was consumed by flames. The Jedi questioned him at a later time, but he revealed scant details regarding his offenses.