I cannot remember if the killer is male or female. In college Tim McGee dates someone that he later finds out is a killer. The team have to interview this killer and he/she wants to talk to McGee. The story goes into how the killer and McGee know each other and how the killer was caught. I think the killer was caught when he/she called 911 after McGee fell down the stairs. Everyone thought the killer had pushed Tim but he/she hadn't. Please, Help me find this fic.