it all checked out as that local woman, nicole pietz, who had been missing for a week. 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. what pain? with advil. nueven if you try to eat well,. you might fall short in key nutrients. get more by adding one a day. it's the #1 multivitamin uniquely designed for men and women. one serving, once a day. one a day. and done. i never thought i'd say this but i found bladder leak underwear that's actually pretty. always discreet boutique. hidden inside is a super absorbent core that quickly turns liquid to gel. so i feel protected and pretty. always d