The way the state constructed the case, there’s no one big shiny piece of evidence for the defense to knock down. Instead, there are a million little threads to pull at. With less than two months until the execution, the lawyers comb through the evidence one last time, and a new witness offers unexpected revelations. 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. (https://www.nytimes.com/newsletters/serial) Have a story pitch, a tip, or feedback on our shows? Email us at serialshows@nytimes.com (mailto:serialshows@nytimes.com)