the University of California at Santa Cruz with schizophrenic reaction, paranoid type. Mullin had interactions with Edmund Kemper, another serial killer active in the same area and at the same time as he was. The two shared adjoining cells at one point. Kemper disliked Mullin, saying he killed for no good reason. Kemper recalled “Well, [Mullin] had a habit of singing and bothering people when somebody tried to watch TV. So I threw water on him to shut him up. Then, when he was a good boy, I’d give him some peanuts. Herbie liked peanuts. That was effective because pretty soon he asked permission to sing. That’s called behavior modification treatment.” Kemper would describe Mullin as having a "lot of pain inside, he had a lot of anguish inside, he had a lot of hate inside, and it was addressed to people he didn't even know because he didn't dare do anything to the people he knew." In that same interview, Kemper called Mullin "a kindred spirit there" due to their similar past of being institutionalized. Kemper said he told Mullin "Herbie, I know what happened. Don't give me that bullshit about earthquakes and don't give me that crap about God was telling you. I says you couldn't even be talking to me now if God talking to you because of the pressure I'm putting on you right now, these little shocking insights into what you did, God would start talking to you right now if you were that kind of ill. Because I grew up with people like that." Death On August 18, 2022, Mullin died at age 75 from natural causes while housed at the California Health Care Facility. Victims In popular culture Andy E. Horne played Mullin (renamed "Herbert McCormack") in the 2008 direct-to-video horror film Kemper: The CoEd Killer. Mullin was the subject of an episode of the television documentary series Born to Kill?. Mullin was mentioned twice (and was portrayed by uncredited actor Marco Aiello in a flashback) on the police procedural crime drama Criminal Minds. Mullin was covered on the true crime comedy podcast The Last Podcast on the Left starting with episode 416. Mullin was alluded to in the Church of Misery song "Megalomania" from the album Master of Brutality. Mullin was covered on the 57th episode of the true crime comedy podcast My Favorite Murder. Mullin was covered (alongside Ed Kemper) in