How is the data in that report collected? What’s included and what’s not? Do you know?
“In Crime Data, FBI Has to Fill In Missing Pieces,” The Wall Street Journal, October 20, 2018 A2. To make unified national crime estimates, the FBI fills in some gaps in the data it receives from the states. Because it follows a method developed fifty years ago.
Discrepancies run from 2.8% to 68%, per state.