Peter and Sam highlight Kevin McClain and his friendships as they start to break down the version of events supported by the school and police.

As Peter learns more about basketball star DeMarcus Tillman, he uncovers evidence of athletes getting preferential treatment at St. Bernardine.

As Sam and Peter comb through digital clues, they hope a technology glitch might open up some new leads. But a low-tech discovery leaves them reeling.

A former janitor becomes a potential key witness, but Peter and Sam struggle to track him down. Meanwhile, they examine a student trip to Costa Rica.

An interview with a former St. Bernardine student gives the guys confidence that they're on the right track with their most recent theory.

A student's sudden lack of cooperation slows the investigation, but an incident in the school parking lot sends Peter and Sam down a new path.

Who is the Turd Burglar, and why did they do it? Are Peter and Sam still chasing the truth, or has it been right under their nose the whole time?