The researchers measured arrests among NFL players between 2000 and 2014. The data came from two separate NFL arrest databases created by The San Diego Union-Tribune and USA Today.
Violent crimes included murder, manslaughter, involuntary manslaughter, DUI manslaughter, attempted murder, robbery, aggravated assault, sexual assault, rape, statutory rape, battery, assault, domestic violence, child abuse and kidnapping.
The study examined 774 arrests among 573 NFL players. Of those arrests, 209 (27 percent) were for violent crimes. The majority of those players—440 (77 percent)—had one arrest during the period studied. But 91 had two arrests, and 42 players had three or more arrests.