Using Subterfuge to Get a Suspect to Admit Something

There's a show called the confession tapes on net flicks. It seems like using subterfuge to get a suspect to admit something seems like a good idea. But there should be limit, yes, the idea that you could suggest that someone is repressing a memory and basically fuck with their own mind work. At first, chris tap denies any involvement. But overtime he's coerced into telling six different stories,. i would think, ike, there should be one story.