This was a year when on-duty police shootings were at the top of the news. But for many of the officers involved, the issue was anything but new. WaPo reporters found that “more than 50 police officers involved in fatal shootings this year had previously fired their guns in deadly on-duty shootings … For a handful of officers, it was their third fatal shooting. For one officer, it was his fourth.”

+ The Atlantic: Why police need to start second-guessing their decisions.