house, nick prugo gets the shock of his life. >> when the first video came out of audrina patridge's mean, it was on ktla. it was on all the news stations, this video. and they're running me and rachel and you're watching yourself on tv, like, someone's gonna recognize you. oh, my god. >> reporter: you're scared. but not scared enough to stop. >> well, we were scared. and we stopped for like a month, two months, and then, rachel is like, "well, it's fine. someone would have caught us. you know, someone would have said something." and then eventually, the opinion is, you know, keep doing this. and we kept doing it. >> reporter: it's hard to grasp that, because it seems like there were so many layers of dumb here. what did you think would happen? >> i thought there'd be deniability. i mean, rachel, you know, always would like reassure it, like, "oh, there's no evidence." there's no -- you know, no one can prove anything. >> reporter: and that would be a bad assumption. a second surveillance video surfaces and catches the attention of police. >> and that was when i knew we were done. >>