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.

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?

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