CHAPTER THIRTEEN
The Duluth Police Department occupied a building on East Michigan Street that had the architectural personality of a filing cabinet—flat, functional, the color of wet concrete, with narrow windows that suggested the designer had been told to include them but hadn't been told to enjoy the process.
Isla had been here before, once or twice, during the early months of the Lake Superior Killer investigation when jurisdictional lines were still being drawn and everyone was still pretending the turf wars wouldn't happen.
They'd happened anyway, of course. They always did.
Vaughn's workspace was a glass-walled office off the main detective bullpen, small enough that two people and a corkboard constituted a crowd.
She'd turned it into a war room for the Armory case—photos of both scenes pinned to the board, timeline strips in two colors, printouts of the historical society's weapon catalog fanned across her desk like a grim hand of cards.
A whiteboard on the far wall held names, dates, and a web of connecting lines drawn in dry-erase marker with the tight, controlled handwriting of someone who organized her thoughts the way she organized her crime scenes: meticulously, and with the implicit understanding that chaos was always one missed detail away.
Isla stood in front of the corkboard and studied the victims' photographs while Vaughn pulled files.
Thomas Lane stared out from his employee ID photo with the neutral expression of a man who hadn't known he was sitting for anything that would matter.
Mid-thirties, solid face, the kind of unassuming features that disappeared in a crowd.
Six years with Northland Construction. Married, one child—a daughter, four years old.
His wife, Karen, had been interviewed and cleared; she'd been home with the child the night before the murder and had a neighbor who confirmed it.
Lane's financials were clean. No criminal record, no liens, no gambling debts, no affairs that anyone knew about.
He was, by every available metric, exactly what his coworkers said he was: a solid guy who showed up early and did his work.
Clara Hartley's photo was pulled from her firm's website—a professional headshot, warm smile, the kind of image designed to make clients feel their renovation was in creative hands.
Thirty-four. Single, no children. She'd moved to Duluth from Minneapolis three years ago to start her own design practice after a decade at a larger firm.
The Armory project was her biggest commission to date.
Her background check was similarly unremarkable—no debts beyond a modest student loan, no criminal history, no restraining orders filed or received.
She had a cat named Bauhaus, which Isla found oddly affecting and tried not to think about.
"No overlap," Vaughn said, dropping two folders on the desk between them.
"I've been through both of them. Different employers, different social circles, different neighborhoods.
Lane lived in Lincoln Park. Hartley had an apartment in East Hillside.
They weren't in each other's phone contacts.
No shared friends that we've identified, no common memberships, no mutual social media connections.
" She leaned against the desk edge and crossed her arms. "The only thing Thomas Lane and Clara Hartley had in common was walking into the Duluth Armory. "
"Which makes the building the connection, not the people."
"That's where I keep landing." Vaughn gestured at the whiteboard.
"Victim selection isn't personal. It's opportunistic—or at least, it's dictated by who's in the building at the wrong time.
Lane was there early, alone. Hartley was there late, alone.
The killer needs isolation. A window where the target is the only person in the space. "
"Or the only person who isn't the killer," Isla said. She turned from the corkboard. "Who has keys to those display cases?"
"The Duluth Historical Society maintains a master set.
Seven board members have authorized access, plus two staff members at the museum annex where the overflow collection is stored.
I've got a list." Vaughn handed over a sheet.
Nine names, addresses, phone numbers. "None of them have records.
Most of them are exactly what you'd expect—retired professionals, local historians, the kind of people who volunteer for committees and attend fundraising galas. "
Isla scanned the list. "We need to talk to all of them. Not just about the keys—about the weapon collection, the building layout, who knows what's where and how it's organized."
"Agreed. I've already contacted four. The first two were straightforward—Margaret Dunlop, the society president, seventy-one, practically in tears on the phone about the weapons being used this way.
She gave me the full key inventory and confirmed nobody's reported a set missing.
Second was a retired history professor named Andersen, eighty-three, who hasn't visited the Armory in six months because his hip won't let him manage the stairs.
" Vaughn checked her notes. "Two more this morning by phone—both with solid alibis for both nights.
One was in Florida visiting grandchildren.
The other was at a hospital in the Cities for a scheduled procedure. "
"That leaves five."
"Five. And the two museum annex staff." Vaughn grabbed her coat from the back of her chair. "I figured we'd do the rounds in person. People lie more easily on the phone."
They took Vaughn's car—an unmarked sedan that smelled faintly of coffee and the pine air freshener hanging from the rearview mirror, which struck Isla as the kind of small, human detail that made a person's car feel lived in rather than merely used.
Vaughn drove the way she investigated: efficiently, without wasted motion, taking routes through Duluth that suggested she'd driven them a thousand times and could do it in her sleep.
The first three visits took them from one end of the city to the other and produced nothing that altered the picture.
A retired librarian on the society's board, who collected Civil War memorabilia and could recite the provenance of every weapon in the Armory's collection but who weighed perhaps a hundred and ten pounds and walked with a cane.
A husband-and-wife pair who served as the museum annex staff—both in their fifties, both visibly shaken by the murders, both with alibis that cross-referenced cleanly.
A local attorney who'd joined the board for the networking and freely admitted he hadn't visited the Armory in months.
By two o'clock, Isla's notebook held nothing she hadn't already known, and the afternoon was developing the particular gray, heavy quality that late March in Duluth wore like a uniform.
Their fourth stop was Steve Graves, sixty-eight, a retired military officer who'd settled in Duluth after thirty years of service and joined the historical society's board because, as he told them at the door of his neat Cape Cod on Woodland Avenue, he'd spent his career with weapons and wanted to make sure they were respected in retirement.
Graves was lean and upright, with the bearing of a man whose posture had been forged somewhere it couldn't be undone.
He made them coffee without asking if they wanted it—the hospitality of someone accustomed to receiving visitors in a professional capacity—and sat with them at a kitchen table that was clean enough to eat off and organized enough to suggest the rest of the house matched.
He told them what the others had told them—the keys were closely controlled, the collection was invaluable, the murders were a tragedy.
His alibis were verifiable: the night of Lane's death he'd been at a VFW function with forty witnesses; the night of Hartley's, he'd been home with his wife, who confirmed it from the living room doorway.
But when Isla asked about the other board members—not the ones they'd already visited but the ones who took particular interest in the weapons—Graves set down his coffee and looked at her with the careful deliberation of a man choosing his words.
"You should talk to Martin Cross," he said.
"He's on the board. Joined about four years ago.
He's—" Graves paused, and in the pause Isla could feel him weighing loyalty against something else.
"He's passionate. About the collection. More passionate than most of us, and we're all passionate, or we wouldn't be here. "
"Passionate how?" Vaughn asked.
"He visits the Armory more than anyone else on the board.
Two, three times a week, sometimes more.
He's the one who insisted on the detailed cataloging system—every piece documented with photographs, condition reports, provenance records.
That part's been good. The society needed it.
" Graves turned his coffee cup slowly on the table.
"But he's been at odds with the construction crew since the renovation started.
Comes in and inspects the cases, makes sure nobody's disturbed anything, files complaints if he thinks the crew has been careless around the displays.
Gary Hess—the site foreman—called Margaret about it twice.
Said Cross was getting in the way of the work. "
"Does Cross have a key to the display cases?"
"Every board member does. That's the policy." Graves met her eyes. "Martin knows that collection better than anyone alive. Every weapon, every era, every display arrangement. He designed the arrangement himself."
Isla exchanged a glance with Vaughn. The detective's expression hadn't changed, but something behind her eyes had sharpened—the particular focus of a predator catching a scent.
They thanked Graves and were in the car within three minutes.