Deadly rock-throwing attacks on moving vehicles in Colorado.

A 20-year-old Colorado woman, Alexa Bartell, was found dead in her car after a large rock was thrown at it, possibly from another car or the side of the road. Police believe her death was part of an "overnight crime series" involving a light-colored pickup truck or SUV that targeted five drivers. Two drivers had minor injuries while two others were unharmed. No suspects have been identified, and police are encouraging anyone with information to come forward.