Devilish road rager tails mom and sons, GUNS THEM DOWN at dentist office

A Colorado man is facing murder charges after he chases a mom and her sons during a road rage incident. According to police, the suspect then shoots the family down at a dental office parking lot. The gruesome incident left a teen boy dead, and his mother and younger brother in critical condition. Joining Nancy Grace to discuss the case:Wendy Patrick: California prosecutor James Shelnutt : Retired 27-year metro Atlanta Detective, Swat OfficerDr. Daniel Bober: Psychologist Dr. Tim Gallagher Medical Examiner for State of Florida Dave Mack: Investigative Reporter at CrimeOnline