now back to dateline. detectives and san bernardino, california were working around the clock to figure out what had happened to 19-year-old marine wife error erin corwin they soon found out that erin had an affair and that made hers suspect that her husband, john, might have something to do with the disappearance. some of the detectives thought your behavior was strange, that you weren t acting sad enough. do you get why they were thinking that? i understand. i m a very reclusive kind of person, i don t show emotions at all. did you worry at all in the moment that they are looking at me? no, i did not. jon told detectives that his wife said the affair was over. he and erin had reconciled and he d even reestablished his friendship with erin s former lover, chris lee and chris s wife, nicole. but in the first days of their