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.

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.

Peter and Sam travel to a prestigious private high school in Bellevue, Washington, to document the story of a filthy vandal called the “Turd Burglar.”