Teens charged with murder in deadly Colorado rock-throwing spree.

Three 18-year-old men have been charged with first-degree murder, attempted murder, assault, and attempted assault after throwing rocks through random drivers' windshields in Colorado last month. The trio targeted at least seven victims, including 20-year-old Alexa Bartell, who was killed when a rock crashed through the window of her vehicle. Each man faces 13 charges and could face life in prison without parole if convicted of first-degree murder. The men turned around after the rock hit Bartell's car and returned to the scene to take a photo of the crash as a memento.