PART 3
His eyebrows drew together.
“What difference does that make?”
“About two million dollars.”
The room fell quiet again.
I pulled my phone from my pocket and began photographing the controller screen, every modified parameter, the machine serial number, the alarm history, and the timestamp recorded inside the Siemens control.
Richard stepped forward.
“Those are company records.”
I kept taking pictures.
“And this is an independent forensic inspection performed by Parker Precision Services.”
“You’re diagnosing a machine, not investigating a crime.”
I finally looked at him.
“When someone changes protected calibration values without authorization, it stops being maintenance.”
Walter slowly removed his cap.
“I’ve worked here twenty-eight years,” he said. “I’ve never seen servo gains change themselves.”
Neither had I.
The impossible numbers
I plugged my diagnostic laptop into the controller.
Within seconds, the system exported its change history.
Every protected parameter carried a user ID.
Not a name.
A number.
Richard leaned over my shoulder.
“Can you tell who did it?”
“I can tell who logged in.”
The audit trail loaded.
User 14.
Timestamp: 10:41:16 AM.
Twenty-six minutes before my termination meeting.
My stomach tightened.
I already knew who User 14 was.
Tyler Brennan.
The same engineer Mason had mentioned.
Richard immediately shook his head.
“That doesn’t prove anything.”
“No,” I agreed. “It proves someone used Tyler’s credentials.”
Those were two very different statements.
Good engineers understood evidence.
Bad managers preferred assumptions.
I printed the audit report.
Before Richard could reach for it, I signed and dated the bottom.
“Contractor copy,” I said.
He looked irritated.
“You’re making this unnecessarily formal.”
“You fired the informal version of me.”
Walter coughed into his hand to hide a smile.
Tyler arrives
Almost on cue, the bay doors opened.
Tyler walked in carrying a tablet, completely unaware that everyone had turned toward him.
He couldn’t have been older than thirty-two.
Sharp haircut. Expensive watch. The kind of confidence that came from being promoted quickly.
He saw me first.
“Oh.”
Then Richard.
“What’s going on?”
Nobody answered.
I simply held up the printed audit log.
“Were you in this machine at 10:41?”
His expression changed almost too quickly.
“I… checked the offsets.”
“You changed protected servo parameters.”
“No, I didn’t.”
“The controller says User 14 did.”
“I logged in, but I wasn’t changing gains.”
Richard stepped between us.
“Let’s not accuse anyone.”
Tyler immediately nodded.
“Exactly.”
I asked one question.
“What’s the baseline value for third-axis gain?”
He hesitated.
“One twenty… four?”
Walter quietly muttered, “Wrong.”
The correct number was 122.
Tyler looked toward Richard for the briefest fraction of a second.
It lasted less than half a second.
But I noticed.
So did Walter.
The owner walks in
The overhead door opened again.
This time everyone stood straighter.
Eleanor Grant.
Founder of Horizon Precision.
She was seventy years old and had built the company from a twelve-person machine shop into one of the largest aerospace suppliers in the state.
She rarely came onto the production floor.
If she was here, the situation had already reached the boardroom.
Her eyes landed on me.
“Mr. Parker.”
“Ms. Grant.”
Richard immediately began explaining.
“We’ve isolated the failure and Ethan is restoring the machine—”
She raised one hand.
Richard stopped talking.
“Mr. Parker,” she said calmly, “are you working as an employee?”
“No.”
“As an independent contractor?”
“Yes.”
“Then I’d like your professional assessment.”
Richard’s face tightened.
For the next five minutes, I explained everything.
The modified gains.
The altered acceleration limits.
The audit trail.
The alarm cascade.
The production risk.
I didn’t mention Tyler by name until the evidence required it.
When I finished, Eleanor asked only one question.
“Can these parameters be changed accidentally?”
“No.”
“How many confirmations?”
“Three.”
She turned toward Tyler.
“Did you authorize those changes?”
He swallowed.
“No.”
“Did you make them?”
“No.”
She nodded once.
“IT will preserve your laptop.”
His shoulders dropped.
Not because he’d confessed.
Because he realized this was now an investigation.
