NOTE: Data users are cautioned against comparing statistical data of individual cities and towns due to numerous factors, which are known to affect the amount of crime occurring from place to place. Care should be used whenever comparing crime data from one year to the next, or from one department to another. Police record management systems may be changed or upgraded, which may make comparisons difficult, as well as, the efficiency of law enforcement agencies, including the degree of adherence to UCR/NIBRS Reporting Standards and Guidelines.
Uniform Crime Reports (UCR)
The Uniform Crime Reports are published by the United States Federal Bureau of Investigation (FBI) Uniform Crime Reporting (UCR) Program. The UCR Program is a nationwide, cooperative statistical effort of over 18,000 city, university and college, county, state, tribal, federal, and other law enforcement agencies who voluntarily report data on crimes brought to their attention. Since 1930, the FBI has administered the UCR Program. The program's primary objective is to generate reliable information for use in law enforcement administration, operation, and management. However, over the years, UCR data have become one of the country's leading social indicators. Criminologists, sociologists, legislators, municipal planners, the media, and other students of criminal justice use the data for varied research and planning purposes.
The UCR Program consists of four data collections:
Offense and arrest data from the traditional Summary Reporting System (SRS) and the National Incident-Based Reporting System (NIBRS)
Law Enforcement Officers Killed and Assaulted (LEOKA) Program
Hate Crime Statistics Program
Cargo Theft Reporting Program
The FBI publishes annual data from these collections in Crime in the United States, Law Enforcement Officers Killed and Assaulted, and Hate Crime Statistics.