Colorado police arrested three 18-year-olds for the death of 20-year-old Alexa Bartell. Bartell was killed when a rock was thrown at her car's windshield while she was driving. According to officers, Bartell's vehicle was not the only one they struck. Authorities believe the suspects hit a total of seven cars in a 45-minute time span with large landscaping rocks. Inside Edition's Les Trent has more.