From Halopedia, the Halo wiki
Ril accompanied Chol Von while boarding the Pious Inquisitor. Ril and his group were sent to access the drive compartments but were unable to due to Sometimes Sinks sabotaging the access controls. Afterward, Von ordered Ril and his group to set the Inquisitor's plasma turrets to detonate to destroy the ship. After doing so, Ril escaped with the surviving Kig-Yar.
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