Earlier quoted context omitted.
I would argue that non-white neighborhoods are policed heavier, and as a consequence they "catch more criminals" in those neighborhoods.
That wouldn't explain things like murder and other violent crimes. It's not like people are regularly getting murdered in the suburbs, but nobody bothered to check.
Also, depending on what you consider a violent crime, lack of reporting / local police department's doing something about the report can very well have skew crime rates in certain areas.