![scot-peterson-parkland-shooting-surveillance-video.jpg](https://assets2.cbsnewsstatic.com/hub/i/r/2018/03/15/c358ab33-a267-40f4-82c1-1c787cdac36e/thumbnail/640x360/bdf94ffed6502b925c29a71e6a1ac13c/scot-peterson-parkland-shooting-surveillance-video.jpg?v=d8f7565ef3e8b72561ee316b5993cbf9#)
Supervisor: Deputy didn't follow extensive training during Parkland massacre
A former Broward Sheriff's Office deputy didn't follow his extensive training on how to stop an active shooter when he didn't confront the killer who murdered 17 people at Marjory Stoneman Douglas High School, a former training commander testified Thursday.