first started interrogating horta. he lied. why? you know why. you know, he said he wasn't involved, didn't know what we were talking about. slowly, he started giving little bits of information. manuel, do you think i'm stupid? look at me. hey. do you think i'm stupid? >> no. no. >> then why are you treating me like i'm stupid? during the interrogation, you're watching everything. you're listening to the inflection of the voice. you're also looking at their body language. slumped, looking down, touching their face. you know, they're just resigned. at that point you know you're starting to get through to them. >> yes? >> at one point in the interrogation i showed photographs of the two victims to horta. let me -- manuel. let me refresh your memory. laid the photos in front of him. let's put white tape over their mouth. that caused a major reaction. what do you think? does that jog your memory? at that point body language went resignation, started welling up with tears and started crying. i knew he was going to tell us what he knew. >> horta told u