Here's One Theory About Why Cops In America Kill So Many People

The protests and violence sparked by the police shooting of an unarmed 18-year-old in Ferguson, Missouri, have stirred up a debate in the U.S. about the use of lethal force by police. In the chart above, you can see just how alarming American statistics on fatal police shootings are when compared to other Western countries. The FBI reports that in 2011, cops in America killed 404 suspects in acts of "justifiable homicide." Astonishingly, though, as FiveThirtyEight reports, this number likely...