Ten years after the Bever brothers murdered their parents and three siblings as part of a planned killing spree, people still wonder what forces or factors put two Broken Arrow teens on the path to mass murder. This first episode is a narrative retelling of the events of the night of July 22, 2015, uses previous reports, trial coverage and available records from the Broken Arrow familicide case. Read by Tulsa World Reporter Tim Stanley. The written and video series are available at go.tulsaworld.com/bever.