Every law enforcement unit should be investigated for infiltration by white supremacist moles using veterans preference from military service and training to gain a license to kill and/or harass any non-white humans.  This plague has been documented by the FBI and other watch groups, especially beginning with Bush/Cheney's Iraq War.  Included in the military components is the states' National Guards as a haven for these traitors.  Since the privatization of all military, the structures from top down vote 99% Republican and a majority of the officer corps has ties to Old South military colleges and acadamies.  The killing in Dallas resulted in actions across the country of police revealing their racism in social media; a tip of the iceberg.