An anonymous caller leads detectives to subpoena Adnan Syed's cell phone records. As a result, the detectives discover calls to Jen, who is a friend of one of Adnan's acquaintances, a weed dealer named Jay. Detectives interview Jen and then Jay, who says Syed told him he killed Lee, and then forced him to help bury her body. Details of Jay's story shifted in some significant ways over four interviews, but the detectives said they were able to corroborate his story using cell phone records.