There were the other similar attacks reported that same evening:
10:04 p.m. on April 19 – Westminster - 100th Avenue and Simms Street – Rock through windshield, driver not injured
10:26 p.m. on April 19 - Arvada - Highway 93 at Highway 72 – Rock through windshield, minor injuries to driver
Between 10:26 p.m. and 10:45 p.m. on April 19:
Jefferson County - Highway 93 near Highway 128 - No injuries. Rock thrown through minivan’s driver’s side windows.
Jefferson County - Highway 93 near Highway 128 - No injuries. Rock cracked the windshield of a Subaru Forester
Boulder County - McCaslin Boulevard and S. Indiana Street (entrance to Rock Creek neighborhood) - Rock through a windshield, minor injuries to driver
Boulder County – McCaslin Boulevard and S. Indiana Street (entrance to Rock Creek neighborhood) - Rock vs. Toyota 4Runner with body damage to vehicle, driver not injured
10:45 p.m. – Jefferson County – 10600 block of Indiana St. – Rock thrown through the windshield of a yellow Chevy Spark, killing driver Bartell...............
When I lived in Colorado, up until a few years ago, I lived in the mountains about 12 miles west of this general area. When I would go into town I would go through all of these areas. I know all of these locations well.