These serial killers didn't do it alone. Welcome to WatchMojo, and today we’ll be looking at the deadliest duos, be they romantic couples, blood relatives, or simply friends, who spread terror in their corners of the world and together claimed multiple lives.
serial killers who killed together, serial killer duos, serial killers who didn't kill alone, serial killers, serial killer, killers, killer, killers who didn't kill alone, murder, murderer, death, true crime, true crime stories, history, worst serial killers, Paul Bernardo, Karla Homolka, Henry Lee Lucas, Ottis Toole, fred west, Amelia Sach, Annie Walters, Gwendolyn Graham, Cathy Wood, rose west, watchMojo, watch mojo, mojo, top 10, list