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handle is hein.crs/govefva0001 and id is 1 raw text is: Congressional
SResearch Service
NIBRS Participation Rates and Federal Crime
Data Quality
May 24, 2022
Since 1930, the Federal Bureau of Investigation's (FBI's) Uniform Crime Reporting (UCR) program has
collected and published annual crime data. These data are typically delayed by about nine months, and
since 2020 the FBI has also released quarterly crime data. Although the release of 2021 crime data is not
anticipated until late summer or fall 2022, data for the first quarter of 2021 was expected to be released in
early 2022. However, the FBI has announced that due to low participation rates it was unable to release
all of the quarterly 2021 crime data.
The FBI stated that it was not releasing the expected quarterly data due to agency participation falling
below a 60% participation threshold. For 2021, the FBI has received data from 9,881 of the 18,818 law
enforcement agencies (LEAs) in the country (53%). Because this falls short of the 60% threshold, the FBI
released 2021 quarterly data from individual city agencies with populations of 100,000 or greater but
stated that it would not release data by region or aggregate population. The FBI plans to release the full
year of 2021 data with confidence intervals to indicate a lack of precision in the data; however, the FBI
said it would not publish percentage change estimates or compare estimates to prior years. The FBI
further stated that it will not release state-level estimates if the participating LEAs in a state cover less
than 80% of the state population. Given these participation rates, Congress may consider a range of
options to expand implementation of the National Incident-Based Reporting System (NIBRS).
The National Incident-Based Reporting System
The UCR program collects voluntarily submitted crime data from federal, state, local, and tribal LEAs.
Previously, the FBI used the Summary Reporting System (SRS) to collect these data; however, on January
1, 2021, the FBI retired the SRS program in favor of NIBRS. The shift to NIBRS is expected to yield
many benefits, including improved reliability, accuracy, accessibility, and timeliness of national crime
data. NIBRS captures a larger variety of crimes and more details about each incident (e.g., the time of
day) than did SRS. Perhaps most notably, NIBRS eliminated the hierarchy rule, which under SRS
required an LEA to report only the most serious offense if an incident included several crimes. In contrast,
NIBRS allows law enforcement to report up to 10 co-occurring offenses per single incident.
In a 2018 guidance document, the FBI estimated that it would take individual LEAs up to two years to
transition from SRS to NIBRS. NIBRS is more complicated than SRS and the conversion may require
Congressional Research Service
https://crsreports.congress.gov
IN11936
CRS INSIGHT
Prepared for Members and
Committees of Congress

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