Since there was never a payphone, as stated on today's episode, it's become abundantly clear that Jay was involved in the murder. I'm still on the fence about Adnan.

Close. It uses long-form investigation to tell a non-fictitious murder story, with the host investigating the case and presenting clues along the way as she attempts to solve the case (as listeners do too). No one knows how it's going to end, not even the host. Also, MailChimp is just a sponsor.