CHAPTER NINETEEN
The precinct smelled like stale coffee and exhaustion, and the late afternoon light through the narrow windows had taken on the thin, yellowish quality of a day that knew it was almost over and had nothing left to give.
Isla sat at the table across from Vaughn in the glass-walled office that had become their war room, surrounded by the accumulated debris of an investigation that was generating paper faster than answers.
The corkboard behind Vaughn’s desk was a collage of crime scene photographs, timeline strips, background checks, and the kind of handwritten notes that looked, from any distance, like the work of two women trying to hold water in their hands.
Three victims. Three weapons. Three eras of American warfare deployed against people whose only crime was participating in the renovation of a building someone loved enough to kill for.
And no suspect.
Cross was clean. The board members were clean.
The construction crew had been backgrounded, interviewed, cross-referenced against every timeline they had, and none of them fit the profile Isla was building in her head—a profile that kept shifting shape every time she thought she’d pinned it down, like something alive that didn’t want to be caught.
Vaughn was working through the extended distribution list for the renovation plans—the forty-three names that had ballooned to fifty-one once they’d added subcontractors, city inspectors, and the historical society’s volunteer docents who’d been briefed on the exhibit layout.
Most of them had alibis that checked out.
The ones who didn’t were the ones who didn’t need them—an eighty-year-old docent in a wheelchair, a city inspector who’d been in the hospital for knee surgery during two of the three murders.
Isla rubbed her eyes and stared at the whiteboard.
The web of connecting lines had become so dense it was beginning to look less like an investigative map and more like something a spider would build if the spider were having a nervous breakdown.
She’d added a new section that morning: a list of everyone with both access to the weapons collection and knowledge of the exhibit plans.
The overlap was smaller than the full list but still too wide—fourteen names, most of them already cleared.
“We’re missing something,” she said.
Vaughn looked up from her laptop. The detective’s red hair had escaped its twist hours ago and hung in loose strands around her face, and there were shadows under her brown eyes that hadn’t been there three days ago. “We’re missing a lot of things. Be specific.”
“We’ve been looking at a specific type. Male, likely middle-aged, physically capable of overpowering three adults, with an intimate knowledge of the building and a fixation on its historical identity.” Isla gestured at the whiteboard. “But what if we’re wrong about the first part?”
“The gender?”
“The assumption. We’ve been filtering for men because the kills involved physical violence—a bayonet thrust, a mace, a musket used as a bludgeon.
But the bayonet kill was a single precise thrust. That’s not brute force.
That’s anatomy. And the mace and musket—those are heavy weapons, yes, but Lane was struck from behind, Hartley was on a platform with limited mobility, and Welles was in a narrow corridor.
None of them required overpowering a resisting victim. They required surprise and access.”
Vaughn set down her coffee. The evaluative look she gave Isla was sharper than usual, not skeptical but recalibrating. “You want to expand the search to women.”
“I want to stop excluding them.” Isla turned to her own laptop and pulled up the background database they’d been building.
“Run the overlap list again. Everyone with access to the collection and knowledge of the plans, regardless of gender. And this time flag anyone with a criminal history involving weapons. Not just firearms—edged weapons, blunt instruments, anything that involves a physical attack.”
Vaughn was already typing. The database search took less than two minutes, and when the results populated, a name surfaced that neither of them had flagged before.
Patricia Lang. Museum curator.
Isla leaned forward and read the profile.
Lang was fifty-two, employed by the Duluth Historical Society as the curator of the museum annex on Second Street—the facility where the Armory’s overflow collection was stored.
She’d held the position for nine years. Prior to that, she’d worked at a regional history museum in Eau Claire, Wisconsin, and before that at a private collection in Minneapolis.
Her educational background was in museum studies and American history.
She was listed on the renovation plans distribution as a primary stakeholder in the exhibit design, responsible for cataloging, condition assessments, and placement recommendations for every artifact that would populate the new displays.
She had access to every weapon in the collection. She had detailed knowledge of the exhibit plans, down to which piece went where. And she had a criminal record.
Isla clicked through to the details and felt the air in the room change—not dramatically, not the way it did in movies when the music swelled and the detective’s eyes widened, but the quiet, incremental shift of something falling into a slot it might have been made for.
Twelve years ago, in Eau Claire, Patricia Lang had been charged with aggravated assault with a deadly weapon.
The weapon was an eighteenth-century hunting knife from her personal collection of antique artifacts.
The victim was her ex-husband, David Lang, who’d sustained a four-inch laceration to the abdomen requiring emergency surgery.
Patricia had been convicted of a lesser charge—assault causing bodily harm—and served fourteen months.
The marriage had ended during the proceedings.
“She stabbed her ex-husband with an antique knife,” Isla said.
Vaughn came around the desk to read over her shoulder. The silence between them was the productive kind—two minds running the same calculations independently and arriving at the same place.
“Museum curator,” Vaughn said. “She’s not on the board. She’s staff. She’s the person who actually handles the collection, day in and day out. She wouldn’t just know the exhibit plans—she helped design them. And the locks on those cases, the combination on the climate cabinet—”
“She’d know all of them.” Isla scrolled further.
Lang had been present at every planning meeting for the renovation.
She’d attended three of the four town halls the city council had held about the project.
Her name appeared on internal emails about crew schedules, building access protocols, and the timeline for artifact transfers.
She knew when the construction crew arrived and when they left.
She knew which workers had keys and which didn’t.
She knew Zach Welles’s schedule because she’d been coordinating with him on artifact cataloging.
She knew all three victims’ routines.
“Why didn’t this come up before?” Vaughn’s voice carried the controlled frustration of a detective confronting a blind spot in her own investigation.
“Because we weren’t looking for it. She’s staff, not a board member—she wasn’t on the initial key-holder list you pulled because the board controls formal access.
And the criminal record is from Wisconsin, over a decade ago.
It wouldn’t have flagged in a standard Minnesota background check unless we specifically ran an interstate search.
” Isla paused. “And because we were looking for a man.”
The admission cost something. Isla felt it—the particular sting of a profiler confronting an assumption she’d treated as a given.
She’d built the psychological framework around a male subject: the physicality of the kills, the territorial relationship with the building, the quasi-military methodology.
All of it still fit Lang. Every piece of it.
She’d simply never turned the lens to see it.
Vaughn grabbed her coat. “Let’s go.”
***
Patricia Lang lived in a duplex on West Third Street, a modest structure with brown siding and a front porch that sagged slightly at one corner.
It was not, Isla noted, the home of a woman who defined herself through her possessions—unlike Martin Cross’s museum-in-miniature, Lang’s exterior gave nothing away.
A practical car sat in the driveway. The walkway had been shoveled but not salted, the ice patches along the edges suggesting a person who did what was necessary and nothing more.
Lang answered the door on the first knock, which meant she’d seen them coming.
She was a compact woman—five-four, maybe five-five, with broad shoulders and strong hands that spoke of years spent handling heavy objects with care.
Her hair was dark brown streaked with gray, cut short in a style that prioritized function over form, and her face had the angular, watchful quality of someone who spent more time observing than speaking.
She wore a flannel shirt over a thermal, jeans, and work boots—the clothes of a person who’d been doing something physical before they arrived.
She looked at their badges with an expression that was difficult to read. Not surprise. Not fear. Something closer to resignation, as though she’d been expecting a knock on this door for longer than just the time it took them to walk from the car.
“Ms. Lang,” Isla said. “I’m Special Agent Rivers, FBI. This is Detective Vaughn, Duluth PD. We’d like to ask you some questions about the Armory investigation.”
“Come in,” Lang said. She stepped aside without ceremony.