Gaetan Dugas was openly gay. In early 1980s he contracted what was termed "gay cancer". He provided blood samples and 72 names of his former sex partners. Dugas was demonized for his promiscuity and wrongfully identified as patient zero. (IMDb)
Based on actual events of American serial killer Edmund Kemper, who murdered his grandparents at age 15 and, after being paroled for that crime, killed eight women in 1972 and 1973 including his own mother.