Fatal Colorado rock-throwing spree leads to multiple arrests.

Three Colorado teenagers have been arrested for throwing large landscaping rocks at cars on at least seven occasions since February, with the final incident resulting in the death of 20-year-old driver Alexa Bartell. One of the suspects allegedly took a photo of Bartell's car after hitting it "as a memento." The teens are charged with first-degree murder with extreme indifference, and additional charges are expected. The suspects made their first court appearance on Thursday and are set to return on May 3.