drizin believes that chris looked guilty because of the psychological tactic that he said detectivesi? >> one thing that interrogators often do is they attack a suspect's confidence in their own memory. >> i wasn't there! the way i think you're telling it to me is like i was there. the police told me a few times if there was something that horrific, you would definitely hide it and it'd go in your subconscious. >> it's just like me on some of the brutal stuff that we see out on the streets. my mind shuts down on me because i don't want to remember it. >> i started second-guessing myself during all this. i started to not believe in myself or who i was. i don't know because right now everything i've been saying, what i think is right in my head, it's been wrong. >> it causes a crisis of confidence in the suspect. the suspect doesn't know whether those memories are real or they are imagined. you can feel the stress on him, and it's really hard to watch. >> you were there. you're the one that held her down. ben asked you to kind of help. is that correct? >> yes, sir. >> i believe this co