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Professor-turned-police officer shares her experience ‘behind the blue line’

05:13

Rosa Brooks, author of “Tangled Up in Blue,” joins Lawrence O’Donnell to discuss her experience as a Washington D.C. Metropolitan Police reserve officer. Brooks says throughout academy training, police officers are “primed to think that a threat could come from anywhere at any time,” but they must remember their “top priority is protecting the communities they serve.” Marq Claxton also joins.