What does it take to get a police officer punished for killing an unarmed black man? Eugene Robinson / Wash Post

Watch the video. Walter Scott, unarmed and slow of foot, tries to run away. Police officer Michael Slager calmly fires five rounds into Scott’s back. Later, Slager approaches Scott’s body, not to give first aid but apparently to plant evidence of a struggle that never took place.

Now tell me: How cheap is black life in these United States of America?

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