It's a mystery that has plagued a California community for more than 20 years: what happened to Kristin Smart? Now that police say they are investigating new leads, could there soon be answers? This week, authorities in San Luis Obispo issued search warrants and briefly detained a longtime person of interest in the case. Smart was a 19-year-old freshman at Cal Poly State University when she went missing in May of 1996. InsideEdition.com’s Mara Montalbano has more.