“The FBI’s Crime Data Explorer (CDE) aims to provide transparency, create easier access, and expand awareness of criminal, and noncriminal, law enforcement data sharing; improve accountability for law enforcement; and provide a foundation to help shape public policy in support of a safer nation. Use the CDE to discover data through visualizations, downloads in .csv format, and other large data files…The Crime Data Explorer (CDE) is the FBI’s Uniform Crime Reporting (UCR) Program’s dynamic solution to presenting crime data in a more immediate venue that reflects the constant change in the nation’s crime circumstance. The CDE pages provide a view of estimated national and state data, reported agency-level crime statistics, and graphs of specific variables from the National Incident-Based Reporting System (NIBRS). You can also download bulk datasets from a variety of UCR topics. In addition, the Crime Data API (application programming interface) provides a way for developers to access and share large amounts of data in significant ways. The Crime Data Explorer is part of the FBI’s broader effort to modernize the reporting of national crime data. It allows you to view trends, download bulk data, and access the Crime Data API for reported crime at the national, state, and agency levels….”

• See also FBI State/Agency Data
• Also via Popular Information, Jeff Asher, co-founder of AH Datalytics, creator of the Real-Time Crime Index, and one of the nation’s leading experts in crime statistics: “The murder trend—the decline—is the largest we’ve ever seen, based on the data we have, which goes back to 1960. While it’s not the full history of the nation, it’s the largest percentage change recorded over that period, in terms of fewer victims from one year to the next. That’s significant because murder is the most serious offense, with the highest societal cost, and it’s the one we have the most confidence in. Everything else tends to be under reported to some degree, but we believe the murder count is fairly accurate.”