 In season 6, he reappears in the episode "Nebraska" as the sole survivor of his family who has been reportedly murdered by the Trinity Killer.While Dexter suspects that Jonah was the perpetrator, with supporting evidence, Jonah's guilt emerges in a confrontation which shows that he killed his mother for instigating his sister's suicide.No longer truly fitting the Code of Harry, Dexter tells him to forgive himself and returns to Miami.