Tenth Brother

Prosset Dibs was a Jedi Master who was banished from the order after falling to the Dark Side of the Force and later joined the Galactic Empire as the Inquisitor Tenth Brother under the command of Darth Vader.

The Tenth Brother followed Vader and fellow Inquisitors to Mon Cala in their hunt for Jedi Knight Ferren Barr, who was advising King Lee-Char against the Empire. At the Dark Lord of the Sith's orders, the Inquisitors went after their target. Cornered, Barr revealed his pursuers identities as former Jedi to the Purge Troopers. Having learned of this, the clones enacted Order 66 and unexpectedly opened fire upon the Inquisitors, killing the shocked Tenth Brother.