Joran van der Sloot, the young Dutchman charged with the murder of Stephany Flores, a 21 year-old Peruvian woman, and the number one suspect in the infamous disappearance of Alabama teenager Natalee Holloway, has boasted about receiving marriage proposals while locked up, and earlier this year, he reportedly impregnated a woman he started dating while in prison. Now, Newsweek’s Christopher Dickey and Andrea Zarate report on Dr. Mary Hamer, a Florida radiologist who’s become his self-styled “guardian angel.” But Van der Sloot isn’t the first famous inmate with a fan base. From John Wayne Gacy to the Night Stalker, The Daily Beast looks at women’s infatuation with killers over the years.