it all checked out as that local woman, nicole pietz, who had been missing for a week. the diamond tennis bracelet she always wore was not on her wrist, but police were confident enough in their tentative i.d. to pay a visit to nicole's husband, david. and the information david pietz would soon share with detectives about when his wife was last seen and what she left behind would be critical to the case. >>> coming up -- but it was something that was missing that turned out to be even more important and puzzling. >> there's no indication that anyone else had been behind the wheel of nicole's car. >> when "dateline" continues. dray, when he was younger, he loved to smile; and we knew he would need braces because his teeth were coming in funny. that's when he had the bunny rabbits. we called him the bunny rabbit. now, those are the same two front teeth, there, that they are now. then dray ended up having to wear braces for 5 years because he never made it to appointments, because he was busy playing basketball. if he missed practice, he don't get to play in the game. this