The use of the Mail Robot was Gene's idea. He later says he enjoyed his three-hour questioning by Walter Taffet, because he was the first person Gene had talked to at work who understood computers, and information.
In order to divert attention from Martha, Gene is murdered in his apartment by Philip, who plants evidence indicating Gene was responsible for bugging Gaad's pen. In addition to causing a rift between Martha and Philip, Gene's death weighs heavily on Philip. He is shown visiting the grave, after Martha is exfiltrated.