Ferguson, Missouri. Cleveland, Ohio. Staten Island, New York. Eutawville, South Carolina.
In each place, individuals — all unarmed except for a child carrying a pellet gun — died at the hands of police officers. All of the dead were black. The officers involved, white.
To many Americans, it feels like a national tidal wave. And yet, no firm statistics can say whether this spate of officer-involved deaths is a growing trend or simply a series of coincidences generating a deafening buzz in news reports and social media.
"We have a huge scandal in that we don't have an accurate count of the number of people who die in police custody," says Samuel Walker, emeritus professor of criminal justice at the University of Nebraska at Omaha and a leading scholar on policing and civil liberties. "That's outrageous."
There are some raw numbers, but they're of limited value.
The FBI's Uniform Crime Reports, for instance, track justifiable police homicides — there were 1,688 between 2010 and 2013 — but the statistics rely on voluntary reporting by local law enforcement agencies and are incomplete. Circumstances of the deaths, and other information such as age and race, also aren't required.
The Wall Street Journal, detailing its own examination of officer-involved deaths at 105 of the nation's 110 largest police departments, reported last week that federal data failed to include or mislabeled hundreds of fatal police encounters.
Put simply: It's hard to know for certain what is happening on the ground.