They knew where the site sat.
They knew which route avoided the primary cameras.
And they knew enough to choose a holiday weekend when staffing patterns changed.
Not random.
Marcus stood beside me in the temporary command trailer.
“You thinking what I’m thinking?”
“Yes.”
“Someone testing access?”
“Possibly.”
“For what?”
“I don't know.”
He looked toward the map.
“And Thomas Carter?”
“Maybe connected.”
“Eighteen years apart?”
I nodded.
“Long-lived infrastructure creates long-lived vulnerabilities.”
Marcus studied me.
“You okay?”
“Yes.”
“That was quick.”
“What?”
“Answer.”
I looked at him.
“No.”
“Better.”
Marcus had earned the right to call me on lies.
We spent two hours reviewing the site history.
Then someone found the first real connection.
Thomas Carter had not merely performed electrical maintenance.
He had helped install the original backup access-control wiring during a site upgrade.
That made sense.
He had been a talented electrician.
According to archived invoices, he worked there intermittently for eleven months.
Then the contract ended.
But the access logs continued.
Why?
Nobody knew.
Then an investigator brought in another record.
A maintenance anomaly.
Eighteen years earlier, two weeks before Thomas died, an unexplained failure occurred in the backup access-control circuit.
Temporary repair.
No security compromise reported.
Three days later, Thomas accessed the facility after midnight.
No work order existed.
One week later, he died.
Marcus leaned over the table.
“That’s not great.”
“No.”
“Could be innocent.”
“Yes.”
“You don't believe that.”
“I don't believe anything yet.”
He smiled faintly.
“Sure.”
I ignored him.
At six thirty, Sheriff Mercer called.
He had taken Derek’s formal statement.
Rebecca’s too.
Then something unexpected happened.
Rebecca remembered the notebook.
Not its contents.
Its appearance.
Small.
Black cover.
Thomas kept it in the garage during his final month.
After his death, she could not find it.
Neither could the original investigators.
But she remembered one more thing.
Thomas had hidden objects before.
Not because he was paranoid.
Because he had two sons who borrowed tools without asking.
There was a loose brick behind the detached garage at their old house.
He called it “the bank.”
Derek heard that and immediately drove there with Mercer.
The property had changed owners twice.
The garage remained.
The brick remained too.
Behind it was a rusted metal box.
Inside were photographs.
A key.
Several pages.
And half of the missing notebook.
Sheriff Mercer brought the materials to the site.
Derek came with him.
Not in uniform.
Jeans.
Gray shirt.
No badge visible.
He looked smaller somehow.
Not physically.
Just human.
He saw me.
For several seconds neither of us spoke.
Then he looked at my wrist.
A faint red line remained.
“Rachel.”
I waited.
“I was wrong.”
That was not enough.
He knew it.
“I shouldn't have touched you.”
Still not enough.