Betton developed a romantic obsession with his therapist Heather Kessler, but he could never muster the courage to make advances towards her. He later made outlandish claims that he was the first man to undergo Heather's sex therapy. At some point of his life, he developed lymphoma. Three months prior to Immortality, Heather shut down her psychiatry practice after her granddaughter was struck and killed by a car. Learning of this, Betton went into a downwards spiral and blamed Gil Grissom for the recent events, believing that he turned her submissive after stopping her from killing Leon Sneller, a man who murdered her daughter. As a result, Betton hypnotized former patients of Heather's and turned them into suicide bombers.