In this Dateline classic, after college student Angie Samota was stabbed to death, police had no shortage of suspects; a crucial clue narrowed their list to one name, but it would be years before technology and a tenacious friend came together to help unravel this mystery. Josh Mankiewicz reports. Originally aired on NBC on June 8, 2012. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.