Numb3rs Episode 3.05 Traffic

Don and his team must determine if a shooting on the freeway was a random act of violence or the work of a serial killer preying on the citizens of Los Angeles. When a father driving with his two children is gunned down on the freeway, Megan is puzzled when she can't find a specific pattern to the suspect's behavior and goes to Charlie for some insight. But as additional freeway incidents occur, Don uncovers an unlikely clue that may lead them to the killer.