: Agents receive a tip from classified sources (like the NSA). Since they cannot use classified data in court without revealing sources, they "construct" a parallel investigation—such as a routine traffic stop—to "discover" the evidence legally.
The episode's title refers to a real-world tactic used by the DEA's Special Operations Division (SOD). [S5E13] Parallel Construction, Bitches
: Critics argue this violates the Fourth Amendment and the "fruit of the poisonous tree" doctrine, as it bypasses the need for warrants by pretending the investigation started with the parallel event. Discussion Highlights Reviewers and fans often point out: : Agents receive a tip from classified sources