The rain on State Street sounded like someone dropping pennies from the eighth floor. I had been sitting in this office for twenty-seven years and I knew every sound this building made—the elevator that groaned on its cables, the radiator that hissed like an angry cat, the footsteps of detectives who had more whiskey than sense and less sense than whiskey.

Rose DeLuca walked in at two in the morning with wet shoes and a waterproof envelope, and I knew three things about her before she sat down: her husband hadn't drowned, the man who pushed him was someone she knew, and she had already decided to trust me even though every instinct told her not to.

I know how to read people. Thirty years on the Chicago PD taught me that. It's not magic. It's the way your hands move when you're lying about where you were last night. It's the way your eyes dart to the left when you're making up a name. It's the sound of a woman saying her husband was a good man while her jaw muscles flex like she's chewing on broken glass.

"Mr. Callahan," she said. Her voice was steady—too steady for a widow who had just lost her husband. The kind of steady that comes from being too angry to be sad.

"Ms. DeLuca." I gestured to the chair across from my desk. The one with the torn vinyl that makes people uncomfortable. I do that on purpose. People tell me more when they're uncomfortable. "What can I do for you?"

She placed the envelope on my desk. It was thin—maybe ten pages. I could feel the weight of it without opening it. Ledgers or letters or both. The kind of evidence that gets people killed in this city if you don't know what you're doing with it.

"My husband didn't drown," she said. "He was pushed."

I kept my face neutral. I've learned that the best thing you can do when someone tells you something big is nothing—just sit there and let the silence fill up until they give you more. "I'm sorry for your loss," I said. It was true. It was also not enough.

"He worked the docks. Longshoreman. He came home every night. He never missed a shift. And then one night he didn't come home and they found his body in the river and the coroner said accident and I—" She stopped. Her hands were on the desk now, knuckles white. "I know he was murdered."

"By whom?"

She looked at me for a long time. Then she looked at the door. Then she looked back at me. "You're going to ask me if I'm sure."

"I'm not going to ask you anything."

She was wrong about that. I asked her everything. Where was he working the night he died. What union was he in. Who were his foremen. Who were his friends. Who were his enemies. She answered all of them. Her hands didn't stop shaking until she told me about the man whose name was on the envelope.

I opened it. Inside were three pages of numbers—dates, amounts, names. Union dues paid to an account that didn't belong to any legitimate union. Dates that lined up with dock strikes. Names that lined up with city officials. It was money laundering on a scale that made my stomach turn.

"I don't understand," I said. It was the first honest thing I'd said in hours.

"He was a good man," Rose said, "and good men don't figure out how half the money in this city moves without leaving a paper trail. He found the trail and he was going to follow it and someone didn't want him to."

She left at twenty-three minutes past two. I sat in the dark office for another hour and read the ledger twice. When I finally went home at five, the rain was still falling and the streets were still empty and I was thinking about the fact that Rose DeLuca was either the bravest woman in Chicago or the most stupid, and in this city brave and stupid are often the same thing. They came to me one by one. Not all at once—there's a rhythm to this kind of thing, a pulse you can feel if you're paying attention. Rose was the first note. Then came Carmen Ortiz, who owned a tavern on Halsted Street and knew more about the union-syndicate money flow than any civilian should. Then Maria Santos, whose brother had been a union steward until he stopped being a brother because his body stopped turning up.

Each woman brought a piece. Each piece fit. By the end of three weeks, I had enough evidence to bring down the entire extortion ring—the one that ran from the docks through the union halls to city hall and up into the police department, where men in my rank had been taking checks with our department's seal on the back.

Carmen was the most useful and the most dangerous. Sharp-tongued and sharp-dressed, she ran her tavern like a general runs a battlefield—knowing every soldier, every supply line, every weak point in the enemy's position. She told me things over whiskey that she wouldn't have told me over water.

"You want to know about Frank Rourke?" she said. We were sitting in the back room of her tavern, the one with the lock on the door that doesn't work. "Frank's brother-in-law is the alderman. That's not gossip. That's fact. Check the marriage certificate."

"I don't

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