The physical evidence against Adnan Syed was scant - a few underwhelming fingerprints. So aside from cell records, what did the prosecutors bring to the jury, to shore up Jay's testimony? Sarah weighs all the other circumstantial evidence they had against Adnan, including curious behavior, a disconcerting note, and an unexplained mid-afternoon phone call. Our newest podcast, “The Preventionist” is out now. Search for it wherever you get your podcasts.To get full access to this and other Serial Productions and New York Times podcasts on Apple Podcasts and Spotify, subscribe at nytimes.com/podcasts.To find out about new shows from Serial Productions, and get a look behind the scenes, sign up for our newsletter at nytimes.com/serialnewsletter.Have a story pitch, a tip, or feedback on our shows? Email us at serialshows@nytimes.com