Find out who's been stealing from Anson

Find out who's been stealing from Anson was going to be a quest in Van Buren, the canceled Fallout 3 by Black Isle Studios. It is located in Jericho and given by Anson.

Background
As Van Buren was never completed, neither was the quest. It was, however, supposed to be a mission to wipe out the Vipers, The Rusty Hooks, the Jericho water plant and Daughters of Hecate.