These layers display various violent crime and property crime rates and totals in counties across the United States. Violent crime includes murder, rape, robbery, and aggravated assault while property crimes include burglary, larceny-theft, motor vehicle theft, and arson. Crime totals and rates are multi-year estimates for the three year period 2015-2017. County-level UCR files are based on agency records in a file obtained from the FBI that also provides aggregated county totals. NACJD inputs missing data and then aggregates the data to the county-level.