The document discusses various topics related to measuring and explaining crime including:
1. How the FBI collects and reports crime data from over 17,500 policing agencies each year.
2. The differences between Part I and Part II offenses in the Uniform Crime Report.
3. Additional data sources like the National Crime Victimization Survey which measures both reported and unreported crimes.
4. Explanations for trends in crime rates over time as well as relationships between crime and factors like race, poverty, and gender.