Some murder cases lie unsolved for 20 or 30 years, gathering dust in a back room. But the Metro Police Department is dusting off those files and tracking down suspects - suspects who think their crimes are long forgotten. They've solved 9 cases in one year - one of the highest rates in the country. But how do you solve a cold case? How do you handle evidence that's 20 years old? We talk to Metro's head of violent crimes, plus a DNA scientist, on how they're solving old cases, arresting suspects, and helping families lay ghosts to rest.
GUEST
Lt. George Castro, violent crimes section, LVMPD
Kim Murga, DNA laboratory manager, LVMPD