Law enforcement includes sheriffs, police, and state agencies.
The committee determined the most appropriate tool in which to record crime statistics was to base the measurements on established criminal offenses already known to law enforcement. Accordingly, the committee evaluated various crimes on the basis of their seriousness, frequency of occurrence, pervasiveness in all geographic areas and the likelihood of the offense being reported to law enforcement. After studying the state criminal codes and making an evaluation of the record keeping practices in use, the Committee completed a plan in 1929 for crime reporting which became the foundation of the National Uniform Crime Reporting Program. S even offenses were chosen as an index for gauging fluctuations in the overall volume and rate of crime. These offenses were known collectively as the Crime Index and were divided into two categories.