The day after five Dallas police officers were killed in an ambush, Montrell Jackson, a black police officer in Baton Rouge, La., took to Facebook to voice his frustration.

“I’m tired physically and emotionally,” he wrote, questioning the “nasty hateful looks” he received as a police officer and the “threat” he felt when he was not in uniform. “When people you know begin to question your integrity you realize that they don’t really know you at all.”

Read more in The New York Times.