Fun fact about the Reid technique: it came into prominence after Reid used it to get Darrel Parker to confess to his wife's murder. That confession was later determined to be false and Parker was paid $500,000 by the state of Nebraska for wrongful conviction.

Which is to say that the cops always knew it was bullshit that's just as likely to get a false confession as a real one, but their job is to arrest people for crimes regardless of whether those people are actually guilty.