Missouri Highway Patrol Capt. Ron Johnson, center right, walks among people protesting the police shooting death of Michael Brown in Ferguson, Mo. Emails sent to top public-safety officials both criticizing and praising Johnson for appearing to sympathize with protesters illustrate one of the challenges that authorities could face after a grand jury decides whether to charge the police officer who killed Brown _ how to walk a fine line between providing public empathy and security. (AP Photo/Charlie Riedel, File)
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