<P> In "No Way Out II: The Evilution of Frank", while Gideon is trying to make up his mind about what flowers to buy his friend, Sarah Jacobs, he sees Jane . When he looks up again, she has disappeared . Gideon then receives a call from Frank, who is in Gideon's apartment, having murdered Sarah . He demands to have Jane back before hanging up . When the BAU begin to investigate, Gideon contacts Hotch from a payphone and tells him that Frank dumped something in the trash on the street, later revealed to be bloody clothing . During the investigation, it is deduced that Frank is hunting down people Gideon previously rescued . Frank later kills one such person, Rebecca Bryant, who was abducted by Randall Garner and held captive for two years before being rescued by the BAU . Later, Tracy Belle, the sole survivor of Jeffrey Charles, goes missing . Gideon and Garcia are later able to figure out that the only story that moved Frank the first time Gideon met him was the body of a woman who was found in an apartment on the Upper East Side of New York City because he was talking about his mother . Gideon then realizes that Frank was hiding his mother's existence from everyone . Later, the team manages to find Frank, who is calmly sitting on a bench at the Union Train Station, waiting for them to bring him Jane . The team brings in Jane, who refuses to go with Frank . Gideon shows up and tells Frank about Sarah, Frank's mother, whom Gideon claims was a whore . As Gideon and Hotch describe Frank's mother, JJ and Reid locate Tracy, who is bound and gagged but alive and unharmed . Frank convinces Jane to come back to him, and the two commit suicide . Later, Tracy calls Gideon and thanks him for saving her once again . </P> <P> Gideon began to lose confidence in his profiling skills after Frank Breitkopf murdered his girlfriend, Sarah Jacobs . During his final case in Arizona, he further lost faith in his abilities when his decision to release the unsub resulted in the deaths of both the unsub and a young woman . As a result of his actions, Aaron Hotchner was suspended, which was the final straw for Gideon . He then left his cabin shortly afterwards, leaving his gun and badge behind along with a letter for Reid to find as he sought to regain a belief in happy endings . He then leaves and begins traveling abroad . Gideon is last seen going into a Nevada diner to make an order . When asked by a waitress where he is going, he replies that he doesn't know where he was going or how he would know when he got there . He then leaves the diner and subsequently drives off in his vehicle . </P> <P> In the season ten episode "Nelson's Sparrow", Gideon was murdered off - screen, having been shot dead at a close range by a serial killer named Donnie Mallick (Arye Gross), which prompts the BAU team to investigate Gideon's murder . During the flashbacks focusing on a young version of him for the episode which show him working at the BAU in 1978, he is played by Ben Savage . </P>

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