Exhibit 4.

Average annual violent crime arrest rates in the study population, by gun-prohibited status, before and after Florida began reporting gun-disqualifying records to the National Instant Criminal Background Check System (NICS)

Source Florida administrative record data assembled for this study, 2002–11.

Notes Number of arrests for any violent crime (including homicide, simple and aggravated assault, sexual battery, robbery, or kidnapping) per 100,000 individuals per year. Gun-involved arrests are included here; when separated, they did not show the same pattern. Results displayed are for a subsample with observations removed for people already disqualified from possessing firearms because of a felony criminal record; rates are higher, with different patterns, when criminally disqualified observations are included.