Kristin Smart, a 19-year-old student at California Polytechnic State University, disappears after attending a campus party. She is still missing more than 20 years later, but now the prime suspect in the case Paul Flores and his father have been charged. Flores maintains his innocence.Joining Nancy Grace Today:Darryl Cohen - Former Assistant District Attorney, Fulton County, Georgia, Defense Attorney, Cohen, Cooper, Estep, & Allen, LLC, www.ccealaw.comDr. Angela Arnold - Psychiatrist, Atlanta GA www.angelaarnoldmd.com Sheryl McCollum - Forensic Expert & Cold Case Investigative Research Institute Founder, ColdCaseCrimes.orgJennifer Dzikowski - Investigative Freelance Journalist