Offence categories · FBI crime statistics
Part I offences
The eight serious offences the FBI's legacy summary system tracked by count.
Part I offences are the eight crimes the Uniform Crime Reporting programme's summary system counted directly: the four violent offences plus the four property offences. They were selected for being serious, comparatively well reported, and consistently defined across jurisdictions.
Everything else — fraud, vandalism, drug offences, simple assault — was a Part II offence, counted only when an arrest was made. This is why the legacy series can say a great deal about burglary and almost nothing about fraud, and why 'total crime' from that era never meant total crime.
Also known as: index crimes, part 1 crimes.
See part i offences in the data
Explore reported offences and trends by state and county, with the coverage caveats stated on every page. Start free — no credit card needed.
Part I offences — FAQ
What is part i offences in crime statistics?+
The eight serious offences the FBI's legacy summary system tracked by count. Part I offences are the eight crimes the Uniform Crime Reporting programme's summary system counted directly: the four violent offences plus the four property offences. They were selected for being serious, comparatively well reported, and consistently defined across jurisdictions.
Why does part i offences matter?+
Everything else — fraud, vandalism, drug offences, simple assault — was a Part II offence, counted only when an arrest was made. This is why the legacy series can say a great deal about burglary and almost nothing about fraud, and why 'total crime' from that era never meant total crime.
Where does this crime statistics come from?+
Figures come from the FBI's Uniform Crime Reporting program — the quarterly national trend series, the National Incident-Based Reporting System (NIBRS), and the annual Arrests and Arson collections. Coverage depends on which agencies reported in a given period. pumsdata is independent and not affiliated with the FBI.