CHAPTER FIFTEEN
The Duluth FBI field office had become a constant companion to Isla. The clock on the conference room wall read eight-seventeen PM, and through the window, the last traces of twilight were surrendering to a darkness that felt more oppressive than usual.
She stood at the window, watching Lake Superior disappear into the night.
The water had turned from gray to black, swallowing the horizon until there was nothing left but the scattered lights of vessels making their way through the shipping lanes—small beacons of civilization against an immense void that could kill a person in a hundred different ways.
"Surveillance team just checked in," James said from behind her, his voice carrying the particular weariness that came from days of running on caffeine and determination.
"Sterling hasn't moved. He's been in his cabin all evening.
Lights on, TV flickering through the window.
No visitors, no phone calls that we can detect. "
Isla turned from the window, rubbing the back of her neck where a persistent ache had taken up residence.
The conference room was littered with the detritus of their investigation—empty coffee cups, printouts of Sterling's service records, maritime charts marked with the locations of every ghost ship they'd identified.
The whiteboard still bore Sterling's name in red marker, a single suspect in a case that seemed to grow more complex with every passing hour.
"He knows we're watching," she said. "A man with his training would spot surveillance within minutes. He's either completely innocent and has nothing to hide, or he's smart enough to wait us out."
James leaned back in his chair, the leather creaking with the movement.
His flannel shirt was wrinkled, his usually neat hair disheveled from running his hands through it too many times.
The past forty-eight hours had aged him, adding new lines around his blue eyes that hadn't been there before the Northern Dawn was found drifting.
"We dug deeper into his activities over the past six months," he said, sliding a folder across the table toward her. "Marina records, fuel purchases, the works. He's been tracking vessels, Isla. Legitimate shipping operations, fishing boats, everything that moves through the harbor."
Isla picked up the folder and flipped through its contents.
Logs of Sterling's boat usage, receipts from marine supply stores, and a pattern of movements that seemed to map the entire waterfront with methodical precision.
None of it was illegal—a maritime security consultant would need to understand local traffic patterns—but the scope of it raised questions.
"He more or less admitted to this when we interviewed him," she said. "Told us he advises shipping companies on anti-piracy measures. This is exactly what someone in that line of work would do."
"Or exactly what someone planning attacks would do." James stood and moved to join her at the window. "He's been building intelligence on every operation in these waters. Schedules, routes, crew complements. If he wanted to identify vulnerable targets, this would be the playbook."
The implication hung in the air between them, heavy with possibility but frustratingly short on proof.
Sterling fit their profile with almost uncomfortable precision—the military background, the maritime expertise, the personal grievance that might have transformed a decorated serviceman into a vigilante executioner.
But fitting a profile wasn't evidence. And without evidence, they were just two agents with a theory and a surveillance team burning through their budget watching a man watch television.
Isla turned back to the window, her reflection ghosting across the glass like a specter.
Beyond her own face, she could see the lights of the harbor—the industrial glow of the port facilities, the navigation markers guiding ships through the channel, the distant sparkle of Two Harbors up the shore.
Somewhere out there, the Coast Guard was running increased patrols, trying to cover a body of water that stretched for hundreds of miles in every direction.
"When I first came here," she said quietly, "almost two years ago now, you told me about the lake. Do you remember?"
James was silent for a moment, then a ghost of a smile crossed his weathered features. "I told you it was dangerous. That it had more ways to kill you than you could imagine."
"You said it was cold enough to stop a heart in minutes.
Deep enough to swallow ships whole and never give them back.
You said the storms could come out of nowhere, that the waves could reach thirty feet, that people who grew up here still treated the water with the kind of respect you'd give a loaded gun. "
"I was trying to prepare you," James said. "Miami doesn't exactly train you for Superior."
"You also said something else." Isla turned to face him, her amber eyes catching the harsh fluorescent light.
"You made a joke—half a joke, anyway. You said that with all the ways the lake could kill someone, you were surprised anyone bothered to commit murder up here.
The water would do the job for free if you just waited long enough. "
The words landed differently now than they had almost two years ago, when she'd been a disgraced agent from Miami still believing her assignment to Duluth was temporary.
She'd laughed at the time, chalked it up to gallows humor from a man who'd spent his career in a place where nature itself seemed actively hostile to human life.
But now, standing in this conference room with photographs of ghost ships spread across the table and a killer who had turned that hostile nature into a weapon, the observation felt prophetic.
"The Lake Superior Killer," she said. "The pattern I found in Sarah Sanchez's death, in all those drownings, everyone else dismissed as accidents.
He understood what you were joking about.
He made his kills look like misfortune because he knew the lake would take the blame.
Nobody questions when Superior claims a victim. "
"And now we've got someone who doesn't bother with subtlety," James said. "Knife wounds, blood on deck, bodies dumped where they'll eventually surface. Two different approaches, same hunting ground."
"Two killers," Isla murmured, the words tasting strange on her tongue. "Operating on the same waters. Maybe for years."
The thought had been nagging at her since they'd first discovered the scope of the ghost ship attacks.
The Lake Superior Killer was patient, invisible, his methodology designed to avoid detection entirely.
The vigilante—Sterling or whoever he was—operated with brutal efficiency but left evidence behind, creating a climate of fear that was impossible to ignore.
Different psychology, different goals, different signatures.
And yet both had chosen Lake Superior as their hunting ground.
Both understood how to exploit the vastness of these waters, the limitations of law enforcement jurisdiction, and the simple fact that people disappeared on the Great Lakes with enough regularity that a few more bodies might go unnoticed.
"Why does this lake attract them?" she asked, though she wasn't really expecting an answer. "Why do so many killers feel the need to help it?"
James moved to stand beside her, close enough that she could smell the coffee and exhaustion that clung to him like a second skin.
"Maybe it's not about the lake," he said.
"Maybe it's about what the lake represents.
Power. Indifference. Something bigger than human law that doesn't care about justice or fairness.
For someone who feels wronged by the system, who believes the rules are rigged against them.
.." He trailed off, his gaze fixed on the darkness beyond the window.
"I imagine there's something appealing about aligning yourself with a force that operates outside all of it. "
Isla considered this, turning the idea over in her mind like a stone worn smooth by water.
Sterling had spoken about justice—his version of it, anyway.
The Lake Superior Killer, if her profile was accurate, likely had his own twisted rationale for the deaths he'd caused.
Both of them had decided that human systems had failed, that something more primal was needed.
The lake obliged. It always obliged. It had been swallowing the unfortunate and the unlucky for thousands of years, and it would continue long after everyone in this room was dead and forgotten.
"The Coast Guard's stretched thin," James said, pulling her back to more immediate concerns. "They've got every available vessel out there, but you can't patrol thirty-two thousand square miles of water effectively. If someone wants to make a move tonight, odds are good they'd get away with it."
"Not Sterling," Isla said. "If Sterling's our guy, he's not making any moves. Not with our people watching his cabin."
"And if he's not our guy?"
The question hung between them, uncomfortable in its implications.
If Marcus Sterling was innocent—if he was nothing more than a disgruntled veteran who enjoyed being suspected of crimes he hadn't committed—then the real killer was still out there.
Still hunting. Still capable of turning another vessel into a ghost ship before morning.
Isla's phone buzzed against her hip, and she glanced at the display.
The surveillance team, reporting that Sterling had just turned off his television and appeared to be settling in for the night.
Routine activity. Normal behavior. The kind of evening anyone might have after being interviewed by the FBI and learning they were under suspicion for multiple murders.
"He's bedding down," she said, sliding the phone back into her pocket. "Surveillance says everything looks normal."