“Years ago (over 10 maybe 20 years, IIRC) Atlanta was cited by the FBI as having fudged on their murder crime rates. In effect what they did was illegal and intentional.It involved in re-classifying murders (or deaths) into other lesser status crimes.”
Mayor Marion Barry did the same for DC. In one year it went from the most dangerous city in America to one of the safest. Murders became suicides or accidents. Apparently the statistics are all self-reported.
Statistics are only as accurate as the statistician .
It all depends on what you are looking for, and what information you want to substantiate .
Even in the Trayvon Martin / George Zimmerman assault location , school security were encouraged by the local police to minimize school crime statistics .