A former special agent says the agency has become top-heavy and self-absorbed. “Uh, Pat, the FBI is at the door,” my wife called out to me on an otherwise quiet Tuesday morning last month. Those words would strike fear in most, but this wasn’t the first time I’d heard such a thing. In my almost two decades with the FBI, colleagues helped with childcare, invited one another over for holidays, and drove each other to doctor appointments. A pop-in wasn’t out of the ordinary. But this time seemed different, and I could hear it in my wife’s voice. Two agents...