While going through the Turd Burglar's Instagram account in episode four, Sam and Peter realise that whatever phone was used to type a caption on one of the photos was infected by Apple's infamous glitch from last year, a bug that changed the letter "i" to the letter "a" and a question mark in a box. They also go through all of the notes in the student union's tip jar about kids at St. Bernadine who fellow students think is responsible for the fecal terrorism, focusing on four students who were accused five or more times.
From there Sam and Peter crosscheck the names with their social media accounts, seeing which of said students had the glitch, and are able to narrow it down to three suspects: Paul Schnorrenberg, Drew Pankratz, and Jenna Hawthorne. But are any of those three actually the Turd Burglar? Well . . .