charged with involuntary manslaughter and reckless conduct. those were, to be sure, serious charges, but they also made clear police believed tex didn't mean to kill diane. tex had dodged a murder charge, but his sister said tex didn't seem to get that. >> he just kept saying, but it was an accident. i said, but someone died. i don't know what he thought. who knows what was going through his mind at that point? >> tex mciver was released on bond, and while he seemed clueless about why he was charged with anything, diane's friends and colleagues wondered if he had been charged with enough. >> i was angry. it is like i didn't care -- i didn't -- i didn't care what i was angry, i didn't care what happened to him. >> in the months since diane's death, dani jo had become suspicious about tex's behavior during that final, fatal drive. so we asked her to take us along the route they drove that night.