by Sue Dremann / Palo Alto WeeklyJohn Getreu sits in a courtroom at the Santa Clara County Superior Court Hall of Justice during a hearing on July 15, 2019. She argued that Getreu should be denied parole because of special circumstances: Getreu murdered three women and raped and threatened to kill a Palo Alto teenage girl in 1975 who was a member of his Explorer Scout troop. Outside of the courtroom, Diane Perlov said that she was satisfied that her sister's killer is unlikely to be freed again, but even the possibility creates unease