Why the confusion over who was arrested in Criminal Minds?

Criminal Minds S9 Ep2 - "The Inspired (Part II)"

When they make arrests at the end:

There seems to be some difficulty over whether they have Jesse or Wallace. They use his learned nervous tick as a differentiator and arrest him accordingly.

Why would they need to do this?

Surely they could just ask him questions that Jesse would know the answer to (e.g. who are these pictures of? What happens in a normal day at work?) and demonstrate it was Wallace by his lack of knowledge of Jesse's life? Also, the BAU would knew he suffered from hallucinations, if they kept him talking long enough he would eventually give himself away.

Perhaps there is there some aspect of the American legal system that I am not familiar with? Or did miss something in the episode?

plot-explanation criminal-minds

Best Answer

I believe there are two things going on here, one with the show, the second with the legal system.

First, the show is about the Behavioral Analysis Unit. To capture their guy through interrogation seems wrong with the premise of the show. Using behavior is much more fitting.

Second, in the US legal system, all incarcerated (arrested or imprisoned) individuals have the right to an attorney and the right to remain silent. An attorney would advise against them talking, while they both may chose not to talk. Putting either/both of them into a room(s) and interrogating them may not produce any information. Besides, it was far easier for the BAU to detect who was whom from the tick than spending hours in interrogation which may or may not have produced results.