andrea canning (voiceover): 4:13 am, lars itzo called 911. ea canning (voiceover): that female was debbie, shot and gravely wounded. andrea canning (voiceover): the 911 operator guided lars through cpr. >> oh, baby. andrea canning (voiceover): police raced up to the house, dash cams rolling. the audio kept recording as they entered the house. [dog barking] lars itzo: [inaudible] andrea canning (voiceover): they found lars standing over debbie's body back by the bedroom. [beep] andrea canning (voiceover): as an officer tended to debbie, lars tried to explain how the shooting happened. >> yeah. >> you hear. >> her voice? >> i was in bed. >> and where did. >> you. >> hear the voices? >> at my front. out front. >> at my front. out front. >> she heard the andrea canning (voiceover): as emts took over trying to save debbie, lars went with police down to the station. they urgently needed more details. where were the intruders? were they armed? what did lars know? what exactly did he do? sitting in the interview room wrapped in cody's dog blanket, lar