messages to his family pretending kevin was still alive. and steve and steve alone who had buried kevin in some woods a few towns over. >> and where did he tell you that he took kevin? >> behind a high school. there was a development being built. >> the interrogation had turned deadly serious, but the detectives thought that morgan's demeanor was odd. when detective maurer asked if he could take pictures for evidence, he says she didn't look like someone facing a potential charge of murder. >> and while i'm taking these pictures she's actually smiling for the camera, which is weird. >> and in the middle of his bad cop interrogation, detective sedlack says it was almost as if she was flirting with him. >> my questioning was not nice by any means and i just couldn't believe that she was smiling and looking up at me. >> is this funny? >> no. am i laughing?