the first season (2021) of the Investigation Discovery podcast, Mind of a Monster. Mullin was featured in a comic book by Kirt Burdick titled Herbie’s Song (2022) See also List of serial killers in the United States List of serial killers by number of victims References Bibliography External links 1947 births 2022 deaths American mass murderers American murderers of children American people convicted of murder American serial killers Male serial killers People convicted of murder by California People from Salinas, California People from Santa Cruz, California People with schizophrenia Prisoners sentenced to life imprisonment by California Serial killers who died in prison custody Serial mass murderers