This Feb. 14, 2018, frame from security video provided by the Broward County Sheriff's Office shows deputy Scot Peterson, right, outside Marjory Stoneman Douglas High School in Parkland, Fla. The video released Thursday, March 15, shows Peterson going toward the high school building while a gunman massacred 17 students and staff members, but stayed outside with his handgun drawn. (Courtesy of the Broward County Sheriff's Office via AP)
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