click, call or visit a store today. >> reporter: in a dramatic turn of events, chris watts in jail. earned that chris was 100% involved, how did you react? >> to be honest with you, i kind of went numb. i sat in my bed and watched the news, and i couldn't move, and i couldn't breathe. >> once chris watts admits that his wife and his daughters are dead, the question now is, where are they? >> reporter: back inside that interrogation room, chris reveals the heartbreaking details of how he disposed of his family's bodies. >> are they buried in something, or -- >> shanann is. >> the babies? >> that's what i feel horrible about. they're in a freaking oil tank. i didn't know what else to do. >> reporter: he's asked to point in a photo the exact location. >> whereabouts are shanann and the girls? can you mark it for me? is that "s" for shanann? okay. and where are the girls? >> here and here. >> reporter: watts marks the spots with their initials. the two girls in separate oil tanks. their pregnant mother, shanann, in a shallow grave nearby. the missing bedsheet, also found on the scene. wh