>> he was in a crisis mode. his thought process was that the world was going to end on friday, and that americans were potentially in harm's way. >> reporter: how do you rationally speak to someone suffering a mental breakdown? >> a lot of patience. a lot of patience. >> reporter: he says rosario was suspicious of police. but he somehow finds a way to build trust. >> i explained to him that i'm a veteran myself. i actually showed him my military i.d. card. i think that was the turning point. >> reporter: after more than five hours of negotiating, no bullets fired, no storming the building, rosario surrenders peacefully. he's taken to a treatment facility, not a jail. >> he was very sick, but he didn't break a law. they got to him before he did something terrible.