After watching Scenes of a Crime, the acclaimed documentary from Grover Babcock and Blue Hadaegh about police interrogation techniques eliciting a false confession, I was struck by how simple and obvious the methods are, yet how utterly effective. If you’ve ever watched more than an episode of the original Law & Order, the Reid Nine Steps of Interrogation should be familiar to you–and no doubt, we think securely, if ever falsely accused of a crime, we’d never fall for them.

Don’t be so sure, says Richard Ofshe, a U.S. expert witness on false confessions.