I have spent a career assessing threats, reading rooms, deciding in seconds whether a person is telling the truth.

It is my job.

And I missed him entirely.

For fifteen years I lived beside a man who was, I would learn, capable of driving to an old woman’s house in the dark to terrorize her, and I did not see it, because he never once let me.

The good ones — the truly dangerous good ones — do not slip.

They are patient.