When a 3-year-old named Michelle Pulsifer disappeared, her father couldn't even get police to search for her -- but he never gave up looking. John Larson reports in this Dateline classic. Originally aired on NBC on July 19, 2009.

Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.