CHAPTER THREE
Miles’s office at Quantico was nothing like his workspace at home.
Where his home office overflowed with case files and obsessive research, his professional space maintained the sterile efficiency expected of a federal forensic scientist. A single desk held his computer, a phone, and a neat stack of current case files.
Bookshelves contained reference manuals and scientific journals arranged in alphabetical order.
No periodic table posters marked with colored pins.
No crime scene photographs taped to walls.
Just the clean, organized environment of someone who analyzed evidence rather than chased theories.
He was reviewing toxicology results from a Baltimore homicide when his phone buzzed with a news alert.
He’d long ago set his phone to notify him of news alerts that might have anything to do with chemical attacks in the US.
He had to read this particular headline a few times before the harsh reality of it sank in.
CHEMICAL ATTACK AT D.C. ELEMENTARY SCHOOL LEAVES TEACHER DEAD
Miles clicked on the article immediately. His pulse quickened as he read the initial details. Roosevelt Elementary School. Kindergarten teacher found dead in her classroom. Suspicious chemical smell that had triggered a hazmat response.
He scrolled down to find more information.
The article was brief, published just thirty minutes ago by a local Washington news station.
Most of the details were still emerging, but one paragraph made his breath catch: Initial reports from first responders suggest the presence of fluorine gas in the victim's classroom.
The entire kindergarten wing of the school has been evacuated and cordoned off while hazmat teams work to identify the exact chemical composition of the suspected poison.
Fluorine. Element number nine on the periodic table. The information landed in his head like a little bomb.
Miles opened a new browser window and searched for additional coverage. Another local news station had posted a brief video report. He clicked play and watched a reporter standing outside Roosevelt Elementary School, emergency vehicles visible in the background.
“I'm standing outside Roosevelt Elementary where emergency responders are treating the death of kindergarten teacher Sarah Morrison as a potential chemical attack.
Principal Margaret Davis discovered Morrison's body early this morning after noticing what she described as a sweet, chemical smell coming from the classroom.”
The camera panned across the cordoned-off school building. Yellow hazmat tape fluttered in the morning breeze. Specialists in protective suits moved methodically around the kindergarten wing. A jumble of traffic was stalled in the background near the intersection of the school.
“Fire department officials tell us they've detected traces of fluorine gas in the victim's classroom, though they haven't confirmed whether this was the cause of death,” the reporter went on.
“The highly toxic chemical can be fatal in small concentrations and would explain the rapid onset of symptoms that apparently left Morrison unable to call for help.”
Miles paused the video and stared at the screen. Fluorine gas. It was impossible to not try attaching this to everything he'd been tracking for three years.
He pulled up his mental catalog of elemental murders.
Hydrogen in Detroit. Helium in Portland.
Lithium in Phoenix. The sequence had continued through eight elements before Diana Hartwell's gold murders in San Francisco.
If this was connected, if his theory was correct, then someone had resumed the periodic table killings with fluorine.
His hands shook slightly as he considered not only what this meant, but as he began to formulate a plan in his mind.
Elena would be in meetings all morning at her pharmaceutical lab.
She wouldn't see the news reports until later.
Which meant he had time to act before she could voice the concerns he already knew she'd have. He had no doubt that if she saw or heard about the story, she’d know where his head was going.
Miles saved the news articles to his computer and exited his office in a hurry.
The walk to Assistant Director Hayes' office felt like the longest five minutes of his professional life.
Every step carried him further away from the quiet laboratory work Elena and his better sense wanted him to focus on…
and deeper into the world of elemental killers that had consumed his thoughts for weeks since San Francisco.
Hayes' door was open when Miles arrived, but the assistant director was on a conference call.
Miles waited in the hallway, checking his phone for additional news updates.
The story was spreading quickly through local media.
Parents were demanding answers about chemical safety at schools.
The mayor's office had issued a statement about increasing security in all public buildings.
“Sterling.” Hayes' voice called from inside the office. “I saw you lurking around out there. Come on in.”
Miles entered to find Hayes pushing aside a stack of documents to allow for less clutter in front of him. By the look of the mess on his desk—forms and files and papers—he’d been quite busy these past few days.
“I assume you're here about the school incident,” Hayes said without looking up from his paperwork.
“Perceptive as always, sir,” Miles replied, jokingly, before realizing this wasn’t the sort of situation he should joke about.
“Well, as I’m sure you know, local PD and hazmat teams are handling the scene. The bureau won't be involved unless they request federal assistance.”
“Sir, I think this is connected to the San Francisco case.”
Hayes' pen stopped moving across the page. He looked up with the expression of someone who'd been expecting this conversation, but hoping to avoid it.
“Connected how?” he asked.
“Fluorine gas, sir. It’s element number nine. The victim was a kindergarten teacher, someone who worked with children and represented innocence and education. The precision of the attack, the symbolic choice of location. It fits the pattern I've been tracking.”
“The pattern that died with Diana Hartwell.” Hayes set down his pen and leaned back in his chair. “Sterling, we've been through this. Your periodic table theory was interesting, but it ended when we arrested Hartwell. She's dead. The case is closed.”
“But what if she wasn't working alone?” Miles pulled out his phone and showed Hayes the news article.
“Look at the sophistication of this attack. Fluorine gas is extremely difficult to handle safely. Just like melted gold. It requires specialized knowledge and equipment. The same kind of technical expertise we saw in San Francisco.”
Hayes read the article quickly, his expression growing more serious as he absorbed the details. “This could be a copycat,” he said. “Someone inspired by the media coverage of Hartwell's crimes.” But Miles heard no conviction in his tone. Even Hayes knew this was a poor excuse.
“Or it could be someone from the same organization.
Someone who's continuing the sequence where Hartwell left off.” Miles felt his excitement building as he articulated the theory he'd been developing since reading the news report.
“Sir, if I'm right about this, we could be dealing with a coordinated group that's been operating for years. Multiple perpetrators, multiple cities, all following the same periodic table methodology.”
“And if you're wrong, you'll be chasing shadows while a real killer operates without any connection to your theory.” Hayes stood up and walked to his window, looking out at the Quantico training grounds. “We’ve had this damned conversation too many times, Sterling.” Hayes took a deep breath to calm himself and locked eyed with Miles.
“Look… you did good work in San Francisco.
Excellent work. But you can't turn every unusual death into evidence of a vast conspiracy.”
Miles felt frustration building in his chest. “Then let me investigate. Give me forty-eight hours to examine the crime scene and determine whether this is connected to the other cases. If I can't establish a link, I'll drop the theory entirely.”
“You'll drop it entirely?”
“Yes, sir.” He felt a sting at making this promise, not fully processing what it could mean.
Hayes was quiet for a long moment. Miles figured he was weighing the request against the political implications of deploying federal resources on what might be just an isolated, local crime. Miles could see his boss calculating the costs and benefits of indulging another of his analytical hunches.
“If I authorize this, you work with Agent Stone again. I'm not sending you into the field alone.”
“Of course, sir. Agent Stone's fieldwork was essential to solving the San Francisco case. I’d be thrilled to work with her again.”
“And you focus specifically on determining whether this incident connects to your periodic table theory. No expanding the scope. No pursuing tangential leads. You answer one question: is this fluorine death related to Diana Hartwell's gold murders?”
Miles nodded eagerly. “That's exactly what I want to investigate.”
Hayes shook his head as if he couldn’t believe he’d just caved, and reached for his phone.
“I'll contact Stone and have her meet you at the crime scene.
You have forty-eight hours, Sterling. If you can't prove a connection in that time, you're back to laboratory work permanently. No more field investigations. No more periodic table theories. Are we clear?”
“Yes, sir. Completely clear.”
But even as Miles agreed to Hayes' terms, he felt a familiar guilt settling in his stomach.
He hadn't discussed this with Elena. Hadn't warned her that another elemental murder might pull him into another active investigation.
She would be at her pharmaceutical lab right now, analyzing clinical trial data and preparing for their wedding, while he was committing to another case that would consume his thoughts and potentially put him in harm's way. Again.
Miles left Hayes' office and walked quickly back toward his own workspace.
He needed to gather his crime scene kit and review what little information was available about fluorine gas poisoning.
The technical literature would help him understand the specific expertise required to weaponize such a dangerous chemical.
But underneath his professional excitement about the case, guilt gnawed at him like a physical ache.
Elena had been patient with him since San Francisco.
She'd tolerated his nightmares and his obsessive thoughts.
She'd supported his work even when it took his attention away from planning their wedding.
Now he was about to disappear into another investigation without giving her a chance to voice her concerns. Without discussing whether his theory was worth risking their relationship. Without considering that maybe she was right to worry about his mental state and safety.
Miles reached his office and began packing his forensic kit. Test tubes, sample containers, chemical detection equipment. The tools he'd need to analyze whatever traces the killer had left behind in Sarah Morrison's kindergarten classroom.
But first, he needed to call Elena and tell her the truth. She deserved that much, even if it meant facing her anger and disappointment about his inability to let go of the case that had already consumed too much of their lives.
The conversation would have to happen tonight. For now, he had a crime scene to investigate and a theory to prove.