Three weeks later, the board has grown.
Donahue stands before it with his coffee — the decent kind, from the diner two blocks away, not the field office machine which he considers a form of institutional aggression — and he works through it the way he works through everything. Methodically. Without rushing.
Eleven kills over fourteen months. All male targets. All with records of violent crime. The shortest sentence among them: two years for aggravated assault. The longest: a man who served six of a fourteen-year conviction for manslaughter and was out on parole for nine months before he died of what was officially recorded as a cardiac event.
Each death officially attributed to natural causes, accident, or undetermined circumstances.
Donahue has a number on a sticky note that he placed in the upper right corner of the board three days ago: 1 in 10 million. That is the statistical likelihood, per his rough calculation, that eleven men with violent criminal records would all die of apparently natural causes within a fourteen-month window in the same metropolitan area without a common cause.
He looks at the number sometimes when he needs to remind himself he is not imagining the shape of this thing.
The medical examiner on two of the cases has been cooperative. A third ME is being difficult in the bureaucratic way of departments that do not want their prior conclusions examined. Donahue is patient with all of them. Patience is his primary professional instrument. Everything else is secondary.
He pins a new photograph. It is from the scene in November — the one with the micro-injuries. He has had it analyzed by a surgical pathologist at the University of Pennsylvania who looked at the photographs and said, in exactly these words: "Whoever did this has held a scalpel for years. This is not textbook knowledge. This is muscle memory."
Donahue wrote that down. Muscle memory.
He steps back and looks at the full board. Fourteen months. Eleven kills. One signature. Medical training, surgical precision, targets with violent records.
He thinks about the charity event. He thinks about the man near the window with the very still face and the hands that were, objectively, remarkable.
He does not put a name on the board. Not yet. He has a partial print from one scene that is not yet confirmed. He has a theory that would not survive contact with a defense attorney. He has the specific certainty that lives in his chest when he has been looking at something long enough to know its shape.
He pins a red piece of string from the November scene to the October scene.
Then he puts his coffee down and goes back to work