it all checked out as that local woman, nicole pietz, who had been missing for a week. e 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. >> 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. if you spit blood when you brush or floss you may have gum problems, and could be on the journey to much worse. try parodontax toothpaste. it's clinically proven to remove plaque, the main cause of bleeding gums. for healthy gums and strong teeth. with parodontax toothpaste. thank you so much. thank you! so we're a go? yes! we got a yes! what does that mean for purchasing? purchase. let's do this. got it. book the flights! hai! si! si! ya! ya! ya! what does that m