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On 16 December 2013, Geary was assigned to extract the DNA of Milton Jones by inserting his blood into a blood vial, which was later found to contain the genetic memories of Adéwalé, an 18th-century pirate-turned-Assassin.
Over the course of her career Deanna befriended Layla Hassan, and in October 2017 the pair were assigned to find an artifact or person of importance to Abstergo in Egypt. During this excursion, Deanna stayed in a hotel while Layla traveled to the Qattara Depression, and as Layla failed to make regular contact with Abstergo, they dispatched Sigma Team to storm the hotel that Deanna was staying in. While Layla overheard gunshots via their comm-link, and then Deanna's side went dark, Deanna's fate is currently unknown.