When Gregory M. Cooper, former head of the FBI's Behavioral Sciences Unit, founded the Cold Case Foundation in 2013, he had high expectations, but couldn't anticipate the level of response. What started with just a half-dozen or so retired FBI agents and homicide detectives has ballooned to more than 150 women and men who volunteer their time to help families of deceased or missing loved ones bring closure to cases that have gone "cold."The Cold Case Foundation shares rive...