Hello so the movie I am looking for I saw on netflix about 2 years ago. From what I remember it was about a young man running from some people and he goes through a mailbox and sees a postcard from a girl and uses the girls name to hide inside the mans house. The man inside claims to be throwing a diner party but is a sociopath, doesn’t have friends an the girl from the post card is fake. He then traps the young man and when the young man threatens to call the cops the sociopath tells him he’s the lieutenant.

hope that made sense and thanks!