In this image made from surveillance video provided by the San Bernardino Police via the San Bernardino City Unified School District, Cedric Anderson walks into North Park Elementary before he opened fire in a classroom in San Bernardino, Calif. The video released Wednesday, May 10, 2017, shows Anderson strolling into the school office at the elementary school on April 10 before killing his estranged wife and an 8-year-old boy. (San Bernardino Police/San Bernardino City Unified School District via AP)