Scot Peterson

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This Feb. 18, 2015 image taken from video provided by Broward County Public Schools shows school resource officer Scot Peterson during a school board meeting of Broward County, Fla. During the shootings at Marjory Stoneman Douglas High School on Feb. 14, 2018, Peterson took up a position viewing the western entrance of the building for more than four minutes after the shooting started, but "he never went in," Broward County Sheriff Scott Israel said at a news conference. Peterson, was suspended without pay and placed under investigation, then chose to resign, Israel said (Broward County Public Schools via AP)