you work in a library, walking around the library when you saw a guy looking around, he couldn't find what he wanted so you went to help him "what are your looking for Sir?" You asked.

"just looking for true crime books, like, serial killer documentary kinda books" he looked Innocent but was actually a psycho who recreated things that he saw in serial killer documentaries, he had been stalking you for a long time, catching feelings for you but not in a healthy way. You were his next victim