S1 E10 Who shat on the floor at my wedding? 'Size of a small fist'

A brand new witness comes forward with alarming information. The team seeks the expertise of someone with high security clearance. Peculiar submarine sighting raises suspicions of drug smuggling. Feasibility and timing of committing crimes from a submarine are explored. Growing concerns and confusion over the leads. Analyzing criminal liability and damage in a private boat incident. The consequences of the crime and the importance of the culprit coming forward.