"It explains more than that," Mercer replied. "Whitaker controlled the access logs, the storage assignments, and the personnel who were allowed into the facility. If he wanted to remove a document, he could make it appear that the document had never been there."
Marcus thought of the crossed-out entry in Miriam's ledger.
"Who else had access?"
Mercer hesitated.
"Three people. Whitaker, Commissioner Cross, and a federal liaison assigned to the corruption task force."
"Samuel Reed?"
"Yes."
Marcus felt a surge of hope.
"Then Reed may know where the remaining evidence is."
"He may."
"Do you know how to contact him?"
Mercer looked away.
"I have an address."
The room fell silent.
Marcus stared at him.
"You've known where Reed might be for seventeen years?"
"No. I obtained the address six months ago."
"From whom?"
"An envelope delivered to my home. It contained a photograph of Reed taken recently and a message instructing me to stop asking questions about the Avery case."
"Why didn't you investigate?"
"Because I recognized the location in the photograph. It was a property owned by Victor Raines."
Sloane swore under his breath.
Marcus stepped closer to the desk.
"Where is it?"
Mercer opened a drawer and removed a small card.
He wrote an address on it and handed it to Marcus.
"An old lakeside property about forty miles north of the city. The building used to belong to a private research organization. Raines purchased it through a holding company."
Marcus took the card.
"Why give this to us?"
"Because I no longer believe that the department can investigate itself without outside oversight."
"That's convenient."
"Perhaps. But it is also true."
Mercer returned to his chair.
"Detective Hale, I cannot undo what happened seventeen years ago. I cannot give you back the years you spent believing your brother was dead. But I can tell you that the official account of his disappearance was incomplete from the moment it was written."
Marcus studied him.
"Did you know Daniel might have survived?"
The chief's eyes flickered.
It was a tiny movement, but Marcus saw it.
"Chief?"
Mercer looked at the photograph on the desk.
"I received a letter five years after Daniel disappeared. It contained a single sentence."
"What did it say?"
Mercer swallowed.
He is alive, but the truth will kill him.
Marcus felt the words strike him like a physical blow.
"Who sent it?"
"I don't know. There was no signature."
"And you kept it secret?"
"Yes."
"Why?"
"Because the letter also contained a photograph of my wife leaving our home. Someone had written her name beneath it."
Marcus stared at him.
Mercer continued.
"I believed that if I reopened the investigation, the people responsible would target my family. I told myself that waiting would allow me to gather enough information to act safely. But the longer I waited, the more difficult it became to admit that I had been wrong."
Marcus felt a familiar anger, but beneath it was something else.
Recognition.
He understood how fear could persuade an otherwise decent person to postpone a difficult decision. He understood how one compromise could lead to another until a person looked back and discovered that the line he had promised never to cross was far behind him.
Understanding did not excuse Mercer.
But it explained how the conspiracy had survived.
Marcus placed Daniel's letter back inside his jacket.
"You have one chance to help us," he said. "If you hide anything else, I'll make sure every document in this office becomes part of the investigation."
Mercer nodded.
"Understood."
Elena stepped forward.
"There's one more question. Why did someone send Marcus a photograph of the toolbox?"
Mercer looked at the image again.
"Because the toolbox was never meant to be found by anyone except Daniel's family."
Marcus frowned.
"What do you mean?"
"The storage compartment connected to the old locker was part of a system Daniel and Reed created to protect sensitive documents. The locker contained references to several locations, but the actual evidence was distributed among separate caches."
Sloane leaned forward.
"How many?"
"Three, according to the records I saw."
Marcus thought of the notebook, the letter, and the brass plate.
"Where are the other two?"
Mercer shook his head.
"I don't know."
"Who does?"
"Possibly Reed. Possibly Raines. And possibly your brother."
Marcus felt his heart begin to race.
"Then we find Reed."
Mercer nodded.
"There's another thing you should know. The property address I gave you may not be safe."
"Why?"
"Because the last photograph of Reed was taken six months ago. I don't know whether he's still there."
"Then why didn't you tell us that before?"
"Because I wanted you to understand that this is not a straightforward investigation. Raines has resources, contacts, and people willing to follow orders without asking questions."
Marcus turned toward the door.
"We're going anyway."
Mercer stood.
"Detective, if you discover that Daniel is alive, you must not assume he can simply return home."
Marcus stopped.
"Why?"