Uniform Crime Reporting Program Data [United States]: 1975-1997

Since 1930, the Federal Bureau of Investigation has
compiled the Uniform Crime Reports (UCR) to serve as periodic
nationwide assessments of reported crimes not available elsewhere in
the criminal justice system. By 1985, there were approximately 17,000
law enforcement agencies contributing reports either directly or
through their state reporting programs. Each year, this information is
reported in four types of files: (1) Offenses Known and Clearances by
Arrest, (2) Property Stolen and Recovered, (3) Supplementary Homicide
Reports (SHR), and (4) Police Employee (LEOKA) Data. Offenses Known
and Clearances by Arrest data files include monthly data on the number
of Crime Index offenses reported and the number of offenses cleared by
arrest or other means. The counts include all reports of Index Crimes
(excluding arson) received from victims, officers who discovered
infractions, or other sources. The Property Stolen and Recovered data
are collected on a monthly basis by all UCR contributing agencies.
These data, aggregated at the agency level, report on the nature of
the crime, the monetary value of the property stolen, and the type of
property stolen. Similar information regarding recovered property is
also included in the data. The Supplementary Homicide Reports provide
incident-based information on criminal homicides. Further, the data,
provided monthly by UCR agencies, contain information describing the
victim of the homicide, the offender, and the relationship between
victim and offender. The Police Employee (LEOKA) Data provide
information about law enforcement officers killed or assaulted (hence
the acronym, LEOKA) in the line of duty. The variables created from
the LEOKA forms provide in-depth information on the circumstances
surrounding killings or assaults, including type of call answered,
type of weapon used, and type of patrol the officers were on.