In the novel "American Psycho" by Bret Easton Ellis, Patrick Bateman engages in violent and disturbing acts towards various individuals, including women named Christie and Sabrina. It is important to note that the depiction of these events is highly graphic and disturbing. In the book, Bateman brutally murders Christie by stabbing her to death, and he also kills Sabrina by luring her into his apartment and then assaulting and mutilating her. These acts showcase the extreme and sadistic nature of Bateman's character.