Well i think its police and the FBI that collect the crime statistics (sorry if that is not your question)
It is a report published by the FBI detailing the overal crime statistics as reported to them by local law enforcement agencies.See below link:
Crime reporting is the reporting of crimes that happen in a particular area of a neighborhood, city, state or country. Crime reporting can include things like crime statistics.
The crime index is otherwise called crime statistics. It is a statistic measurement of crime or crime rate in a particular society, community, country or simply a region. It is mainly used by agencies like FBI in the US, Home Office in England and Wales, Interpol and UN. They mainly collect these information either from Uniform crime reports or individual survey, relaying one their honesty. So the results may not be 100% accurate, but it could give you more or less exact figures to analyse.
The FBI collect the information for the UCR. They collect from the State police. The state police collect it from local police, who gather the information themselves as they investigate crimes.
Statistics is used to collect data on many aspects of our population that include: pregnancy, rape, violence, divorce, health, crime, and many many others.
Not clear what the questioner is asking. (For the US )By accessing the FBI website you can see the results of gathering the Uniform Crime Reporting Statistics summarized quite nicely. See below link.
Check the FBI Uniform Crime Report link on the FBI web site.
Report it to your local police department first. If it's a crime which falls into the FBI's jurisdiction, then the PD will forward it to the FBI.
Crime is committed, and the numbers that measure it are collected, analyzed and become statistics.
The FBI
The "UCR" (Uniform Crime Report) is nothing more than a compilation of crime statistics supplied by all local jurisdictions nationwide and published by the FBI (Dept of Justice). Exactly what the questioner is attempting to ask is unclear.