Cleveland : Tamir Rice died because he failed `` to exercise due care to avoid injury '' A police officer killed Tamir , 12 , December as the boy played with a pellet gun . Officers mistook fake gun for a real one , Cleveland Police Department has said .
Cleveland : Tamir Rice died because he failed `` to exercise due care to avoid injury '' A police officer killed Tamir , 12 , last year as the boy played with a pellet gun . Officers mistook fake gun for a real one , Cleveland Police Department has said .