re:
When an aggressor is killed, the shooting is seldom recorded in the FBI uniform crime reports (UCR) as a justified shooting, because the FBI requires that a report of a felony accompany the report of a justified shooting. There was no robbery here, because the robbery was stopped. That is one of the reasons why the FBI UCR severely under reports justified homicides.
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It is also another way to skew the statistics.
A Washington staple.
A story as old as time: figures don't lie but liars do figure.