Uniform Crime Reporting (UCR) is the primary data standard used by the FBI to record crime for law enforcement agencies across the United States. It tracks eight primary offenses: murder, rape, robbery, aggravated assault, burglary, theft, auto theft and arson. UCR counts only the highest crime category within an incident. UCR provides a platform to compare crime across jurisdictions.
National Incident-Based Reporting System is used by local law enforcement agencies to collect more detailed information about a specific incident. NIBRS collects 46 different crime categories and includes all categories within an incident.