that person was heather's brother, josh. they were fighting a lot? >> oh, yeah. >> according to jen, josh sent heather an ugly text message just hours before heather went missing. berating her for failing a nursing exam. too stupid to pass the lpn battery exam, low expectations of yourself. typical trash like your mom and dad. >> he knew what to say that would get under her skin. >> it was fair to assume that heather and josh didn't always see eye-to-eye. >> o'connell said josh was less than cooperative when approached by versions. >> josh would have his good days on wanting to talk to us and josh would have his bad days of not wanting to talk to us. >> at one point o'connell said he asked for josh's dna, just to rule him out. >> he wouldn't give it to us initially. >> that's got to make you sit up a little straighter? >> it did. >> i sat down with josh.