They are almost as fast with these excuses for black-against-white assaults as the FBI is with their 'no sign of terrorism' when Islamists commit crimes of violence.
Is that what is written in the police training manuals regarding such incidents?
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Police Chief: Delbert Belton beating not racially motivated
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A similar excuse was used for the 3 black kids who beat up the 13 year old white kid on a school bus recently.