Summary of the Uniform Crime Reporting (UCR) Program
The Uniform Crime Reporting Program is a nationwide, cooperative statistical effort of more than 17,000 city, county, and state law enforcement agencies voluntarily reporting data on crimes brought to their attention. During 2002, law enforcement agencies active in the UCR Program represented 93.4 percent of the total population as established by the Bureau of Census. The coverage amounted to 94.3 percent of the United States population in Metropolitan Statistical Areas (MSAs), 89.9 percent of the population in cities outside metropolitan areas, and 89.5 percent in rural counties.
Since 1930, the FBI has administered the Uniform Crime Reporting Program and issued periodic assessments of the nature and type of crime in the Nation. The Program's primary objective is to generate a reliable set of criminal statistics for use in law enforcement administration, operation, and management; however, its data have over the years become one of the country's leading social indicators. The American public looks to Uniform Crime Reports for information on fluctuations in the level of crime, and criminologists, sociologists, legislators, municipal planners, the media, and other students of criminal justice use the statistics for varied research and planning purposes.
Recognizing a need for national crime statistics, the International Association of Chiefs of Police (IACP) formed the Committee on Uniform Crime Records in the 1920s to develop a system of uniform police statistics. Establishing offenses known to law enforcement as the appropriate measure, the Committee evaluated various crimes on the basis of their seriousness, frequency of occurrence, pervasiveness in all geographic areas of the country, and likelihood of being reported to law enforcement. After studying state criminal codes and making an evaluation of the recordkeeping practices in use, the Committee completed a plan for crime reporting that became the foundation of the UCR Program in 1929.
Seven main classifications of crime were chosen to gauge fluctuations in the overall volume and rate of crime. These seven classifications that eventually became known as the Crime Index included the violent crimes of murder and nonnegligent manslaughter, forcible rape, robbery, and aggravated assault and the property crimes of burglary, larceny-theft, and motor vehicle theft. By congressional mandate, arson was added as the eighth Index offense in 1979.
During the early planning of the Program, it was recognized that the differences among criminal codes precluded a mere aggregation of state statistics to arrive at a national total. Further, because of the variances in punishment for the same offenses in different state codes, no distinction between felony and misdemeanor crimes was possible. To avoid these problems and provide nationwide uniformity in crime reporting, standardized offense definitions by which law enforcement agencies were to submit data without regard for local statutes were formulated. The definitions used by the Program are set forth in Appendix II of this publication.
In January 1930, 400 cities representing 20 million inhabitants in 43 states began participating in the UCR Program. Congress enacted Title 28, Section 534, of the United States Code authorizing the Attorney General to gather crime information that same...