Chapter 92: Single Source

Yuki called at 0715, before Sarah had finished her first cup of hotel coffee.

"I have results from the paper analysis." Her voice had the quality it got when the results exceeded the initial hypothesis—faster, the pitch slightly elevated, the technical modulation slipping. "I need you to hear this in person. Are you still in Winchester?"

"Yes."

"I'm driving up from Richmond. Give me an hour and a half."

"Yuki—"

"The results are time-sensitive in a way I can't explain over a non-secure line. An hour and a half." She ended the call.

Sarah drank the rest of the coffee. Opened the evidence box. Looked at the lotus.

She did not open it. She'd made herself a rule last night, in the dark with the box three feet away: the lotus waited until Yuki arrived with whatever the paper analysis had produced. The two pieces of information—whatever was inside the lotus and whatever Yuki had found—deserved to be held together. The rule was arbitrary and Sarah knew it was arbitrary, but she'd found that arbitrary rules were sometimes the only thing that kept the mechanism from getting ahead of the available evidence.

She was in the Winchester field office conference room at 0830, working through the night's incoming evidence, when Marcus arrived with two cups of coffee from the place across the street.

"Your dad," he said.

"Stable. I called this morning." She took the coffee. "Blood clot dissolved overnight. They're doing additional testing, but they think he's going to be okay."

"Good." Marcus sat across from her. He had his own legal pad. He'd been working on the Margaret Volkov background—the public records that could be gathered without the carrier subpoena Tommy was waiting on. "I found her art school registration. After the University of Maryland, she did a certificate program in paper arts at a studio in Baltimore. 2009, 2010. Then she dropped off."

"Paper arts," Sarah said.

"Paper arts." Marcus looked at his notes. "The program included papermaking as one of the course offerings. Traditional methods. She completed the full certificate."

Papermaking.

Margaret Volkov had learned papermaking in 2009, 2010, during the period when her geographic footprint overlapped with Hayes's documented range. She had not just been connected to Hayes through Emily. She had been learning, during the years when Hayes's archive documented her movements, the craft that Hayes practiced.

"He taught her," Sarah said. "Margaret. Not just origami. The paper."

Marcus put down his pen. "That changes the analysis of what she was doing for twenty years."

"She wasn't just monitoring the situation. She was continuing the work." Sarah looked at the wall where Tommy had pinned a printed map—the geographic spread of Hayes's documented movements, the cities where the Archive folder showed Margaret's presence. "Baltimore, 2009. Richmond, 2010, 2011. Portland, 2012 onward. Each location has—"

She stopped.

Tommy was at the door. "The carrier came through. Tower data for the prepaid number."

"Where is she?"

"She's moving. The phone was in Portland forty-eight hours ago—stationary overnight, then started moving yesterday. She's been on I-84 eastbound since this morning. She's in Idaho now."

"She's driving east."

"At highway speeds, yes. She's maybe two days out from the eastern seaboard if she doesn't stop."

Yuki arrived at 0910, still in her coat, her bag over her shoulder, carrying a physical folder. She put it on the conference table before she took her coat off.

"The paper," she said. "From the workshop samples. I ran the full collagen analysis with genetic sequencing—I had enough material from the various samples to do a proper comparison across the batches."

Sarah watched her. Yuki's voice had the technical modulation that meant she was managing her own reaction to the results.

"The early samples," Yuki said, "1997 through approximately 2005. Collagen from multiple sources. The genetic signatures vary—different donors, the kind of variation you'd expect if the material came from multiple people across multiple years. Consistent with the timeline of Hayes's known victims."

"And the later samples," Sarah said.

"The samples from 2006 onward. I expected the same—multiple sources, varying signatures. What I found is—" Yuki stopped. Corrected herself. "What the data shows is a single genetic source. The same collagen signature, present in all samples from 2006 through the most recent papers in the workshop."

The room.

"All of them," Marcus said.

"The handmade papers from 2006 to the present. The paper used in the last twelve crime scene pieces. The paper in the recent workshop batches. The paper in the rose from Hayes's box." Yuki opened the folder and slid a graph across the table—the kind of graph that genomics labs produced, a visualization of genetic similarity across samples. The data points from 2006 onward clustered into a single tight grouping. One source. "This person provided the collagen for all of Hayes's work in the past twenty years."

"Who?" Marcus asked.

"That is what I cannot tell you from the analysis alone. The genetic signature is human. Female. Based on the sample age and the quantity over time, the most probable scenario is that the person is not dead—or was not dead as of the most recent sample, which predates the arrest by approximately eight months. The volume of material produced over twenty years would be consistent with a living donor providing material periodically."

A living donor.

"Voluntarily," Sarah said.

Yuki looked at her. The question was in Sarah's voice, not her face—she knew that much about her own tells. Yuki answered it carefully. "The volume and consistency is not consistent with a single extraction event. The collagen was provided multiple times over multiple years. Whether the provision was voluntary is a legal and ethical question, not a forensic one. The forensic question is who."

"Can you run the genetic signature against—"

"Against the FBI's combined DNA index, yes. I already submitted it this morning. Results will take forty-eight to seventy-two hours through standard processing. I've flagged it for expedited, which might get us to thirty-six." Yuki paused. "There is one other result I want you to be aware of."

She reached into the folder again. Pulled out a single page. Put it on the table.

"The lotus from the fireproof box," she said. "The Front Royal team included a small sample from the box's contents with the delivery last night—trace material only, non-destructive. The paper of the lotus is the same genetic signature as the post-2006 workshop samples."

Sarah stared at the page.

"Emily's lotus," she said. Not a question.

"I cannot confirm the identity without a reference sample. But the lotus and the post-2006 workshop papers share a single genetic source. Whether that source is Emily Chen—" Yuki stopped. "You would need a reference sample."

A reference sample. Something with Emily's DNA from before her disappearance. Hair. Blood. Personal items that had been processed when she first disappeared.

"The original case file," Sarah said. "There was a hairbrush. It was in Emily's room when she disappeared. It should still be in evidence storage."

"If the original case storage is intact, yes." Yuki looked at Sarah with the expression she used when the evidence and the person receiving the evidence were in a difficult relationship—the expression that was not sympathy, because Yuki did not deal in sympathy, but was adjacent to it. "Sarah. I am telling you what the paper shows. I am not telling you what it means."

"I know what it means."

"You know what it might mean."

"I know what it means." Sarah pulled the sheet toward her. Looked at the graph. The tight cluster of post-2006 data points, all from a single source. Hayes had been making his art from the same person for twenty years. Not victims. A single person. A living donor. A person who had been providing the material for his work with enough regularity to supply a continuous practice across two decades.

"The arrangement," she said.

"What?" Marcus said.

"Hayes said he and Margaret had an arrangement. But he also said something else—that Emily was well, that he had made certain of that. That Margaret monitored the evidence record." She looked at the graph. "What if the arrangement wasn't just monitoring? What if it was supply?"

Marcus understood before she finished. His face did the thing it did when the evidence exceeded what he'd prepared for. Not shock—Marcus did not shock easily. The recalibration. "You're saying Emily has been—"

"I'm saying the genetic signature says one living person has provided collagen for Hayes's work for twenty years. I'm saying the lotus that Emily made is the same paper. I'm saying Emily chose to fold. And I'm saying I don't know yet what all of that adds up to, but I need to open the lotus."

She went to the evidence bag. The box was still sealed. She broke the seal, documented on Tommy's camera, and removed the lotus. It sat on the conference table—white paper, tight folds, the compressed flower shape that Hayes had put on his wall and that Emily had reclaimed.

The note inside the lotus that Hayes hadn't read in twenty years.

Sarah unfolded it. Carefully, following the crease lines the way Hayes had described—following the fold path in reverse, letting the paper return to its expanded state without forcing any crease that wasn't already there. The paper had been folded into this shape for twenty years and it remembered the folds the way Hayes had said it would. It opened along the scored lines.

Inside, in the same teenage handwriting as the letters: three sentences.

*I left this so you would know I am not gone. I am somewhere the work continues. Find the fold, and you will find me.*

Three sentences. No signature. No lotus mark. Just the words.

*Find the fold, and you will find me.*

Sarah read it twice. Set the lotus down on the table, face-up, the unfolded paper showing the inner surface and the three sentences written on it.

"What does that mean," Marcus said. "'Find the fold.'"

"It's origami language," Yuki said quietly. "Finding the fold means locating the crease line before you commit to it. You find the fold before you make it permanent."

"So she's telling whoever reads it—" Marcus stopped.

"She's telling me," Sarah said, "where she is. In the code that Hayes taught her. Somewhere the work continues. A place where origami paper is made and used and the craft is practiced."

She picked up her phone. The conversation with Margaret Volkov was still open. Three messages: *I have the box*, *I know*, *She wanted you to have it.*

Sarah photographed the three sentences inside the lotus. Sent the photograph to the unknown number.

Seven seconds.

*Yes,* Margaret wrote.

*She's there,* Sarah typed. Not a question.

Another pause. Longer than the previous ones. Then: *She's been there for twenty years. She built it herself. She's waiting.*

Sarah looked at the genetic analysis graph on the table. The cluster of data points from a single source across twenty years. A living donor. The collagen paper that Hayes had used for his art, provided by a person who had chosen—had *chosen*—to provide it.

Emily had not been a victim. Emily had not died. Emily had gone somewhere and built something and had, for twenty years, been waiting.

For what? For Sarah to find the right fold?

"We need to find where she is," Sarah said to the room.

"I'm working it," Tommy said from the door. "Margaret's phone is still moving east. If she keeps going, she'll be in Montana by tonight."

"She's coming to me," Sarah said.

"How do you know?"

"Because Hayes said *she will contact you when she is ready.* And now she's ready." Sarah put her phone in her pocket. Looked at the lotus. The unfolded paper on the table, the three sentences, the crease lines running through them the way rivers ran through terrain—the paths the paper remembered even after being opened.

"We wait," she said. "And we get the DNA comparison running. And when the comparison comes back—"

She stopped.

Because if the genetic signature matched Emily, then Emily had been alive for twenty years. And if Emily had been alive for twenty years, then the cold case that had ended David Chen's relationship with certainty and started Sarah's career in the FBI—the case that had shaped everything—had not been a case at all.

It had been a choice.

Emily's choice.

And somewhere on I-84 eastbound, a woman named Margaret Volkov was driving toward Sarah with whatever story connected all of it—the workshop, the paper, the lotus, the Archive, the newsprint crane, the twenty years of careful disappearance.

"Call my father," Sarah said to Marcus.

He looked at her. "What do I tell him?"

"Tell him she's alive. Tell him we think she's alive." She picked up the lotus—fragile now, unfolded, the paper opened after twenty years of compression. "He deserves to know what we think before we can prove it."

She held the paper for a moment. The warm quality Yuki had described—the collagen fibers in the material, the organic source, whatever had made it feel different from commercial stock.

The paper that Emily had made.

*It is alive,* Emily had said, the first time she held it.

Twenty years later, Sarah held it. And for the first time since she was seventeen, standing in the doorway of her sister's empty bedroom on a summer morning in 2006, she could not tell if the emptiness she felt was grief or something else.

Something else.