Suspects in Colorado rock-throwing death took "memento" photo as more details emerge.

Three Colorado teens accused of throwing rocks and other objects at cars and killing a 20-year-old woman allegedly circled back to take a "memento" picture of her car after it drove off the road. Joseph Koenig, Nicholas "Mitch" Karol-Chik and Zachary Kwak, all of whom are 18 and were living in the Denver suburb of Arvada, were arrested and charged with first-degree murder with extreme indifference in the death of Alexa Bartell. The teens had been throwing rocks and other heavy objects at cars since at least February. All three suspects are being held without bond.