A Cold Case Went Unsolved for Years. Then Investigators Found a New DNA Lead

A 14-year-old homicide investigation in North Texas has taken a dramatic turn after advances in forensic DNA technology led authorities to arrest a woman in connection with the fatal stabbing of a 32-year-old Arlington resident, NBC 5 reports. Police have charged 42-year-old Mayra Velasquez with capital murder in the 2012 death of Irasema Chavez, a case that had remained unsolved despite years of investigative work.