In the mid-to-late 1970s, Bundy, Gacy and BTK begin claiming victims, while Dahmer and the Green River Killer inch ever closer to realizing their grim fantasies during this moment from Invisible Monsters. | Crime & Investigation on A&E

From 1972 to 1973, 21 individuals were brutally murdered by two serial killers: Ed Kemper and Herbert Mullin. World-renowned criminal psychologist Dr Michelle Ward takes us back to Santa Cruz just before the killings to investigate how such a tiny place could spawn two of America’s most notorious murderers. Listen to episode 1 of 'Mind of a Monster' on Apple Podcasts or wherenver you get your podcasts https://bit.ly/mindofamonsterpod | Investigation Discovery