Episode 3: Looking for motive after Bever murders, investigators find 'just pure evil'

Ten years after the Bever brothers murdered their parents and siblings as part of a planned killing spree, questions linger — Why did this happen? What forces or factors put two Broken Arrow teens on the path to mass murder? Read by Tulsa World Reporter Tim Stanley. The written and video series are available at go.tulsaworld.com/bever.