what on earth had happened to nikki pietz? >> turns out, nikki had a troubled past.hose troubles finally caught up with her? or was it something else? coming up -- >> did you think something was wrong, something more was wrong from the beginning. >> yes. >> when dateline continues. >> nicole pietz, a woman just shy of her 33rd birthday, reported missing by her husband. >> we just want to know she's safe. >> david pietz told reporters how he waited with her with friends at a saturday night dinner party. she was a no-show. >> she was not there. they haven't heard from her. they haven't been able to contact her. >> david appeal to the public to keep an eye out for her. >> we want them to know we love her very much. >> nicki's mom was by his side. >> she's not somebody who wouldn't come home. she somebody that, if she's ten minutes late, she would call. >> did you think something was wrong? did you think something was more was wrong right from the beginning? >> yes, because nicki wouldn't have gone away without telling me. >> if nicki could've called somebody, she would'