it turns out officer don holloway had been listening the entire time. >> i was in the other room typing> so holloway started recording the conversation. every word, every gesture was being captured when amber said something that would change everything. >> he was like messing with the tv right here. and the window is right here. and i pushed him and he fell into the window, fell. oh, god. >> and when through her tears amber said she had pushed josh, her grandmother seemed to sense the gravity of what the words might mean to police. >> quit saying you pushed him out the window. did you intentionally push -- >> no. of course not. >> okay. that's what they're going to take it as, baby. >> was amber's grandmother right? would homicide detectives think the overwrought teenager was talking about an accident or was she describing something much darker? >> who could do that? push my husband and make him fall out the window. >> coming up -- warning signs of a marriage in trouble. >> we just slowly started seeing how different we really were. >> and of a life in danger. >> he was in tears, and he