An Auditor Asked Who Had Kept The Chamber Clock Running

Yvette didn't ask me to bring the drive to a parking lot.

She asked who owned it, what rule covered it, and whether hospital counsel knew it existed.

"The hospital owns the records," I said. "I bought the drive with a reimbursement."

"Good. Please don't send me anything tonight."

That was the first instruction in a week that made my shoulders drop.

We met Monday in a library meeting room on Stone Avenue. She had received written approval from hospital counsel to review the equipment archive with me. Counsel had also stopped the return deadline until an agreed transfer could take place.

Yvette Coleman was fifty-eight, a Black woman with close-cut gray hair, steady brown eyes, and reading glasses on a green cord.

She set a notebook between us.

"The Trust hired my firm," she said. "My questions won't always help you."

"They only need to find what happened."

"That's a useful place to start."

She asked me to explain a normal morning without using the word normal.

I described the seal check, the analyzer check against known gas, and the pressure alarm test. I explained that the logger watched equipment signals. It did not know who sat inside the chamber.

"So twelve minutes could be a short patient treatment?" she asked.

"The file alone can't tell you whether a person was there. It tells you how long the equipment ran. Lena's record says nobody was inside."

She drew two separate boxes on her page.

"Equipment. Patient. We keep those separate until something joins them."

Then her gentle voice changed by half a step.

"What clock did the logger use?"

"UTC. The export screen shows local time, too."

"Which did you give me?"

"Local. Tucson stayed seven hours behind UTC on those dates. The raw file keeps both."

"When was the clock last checked?"

I opened the service binder to a dated comparison with the hospital's time source. The difference had been under two seconds.

"Who could edit an exported spreadsheet?"

"Anyone with the file."

"Who could change the original signed service package?"

"Changing it would break its check mark in the reader. The service company can explain that better than I can."

She wrote its contact number down.

"We'll ask them."

That afternoon, a records specialist met us at the hospital. Counsel attended by video. The specialist copied the archive, recorded matching file checks, and gave each of us a transfer receipt. The hospital took custody of the drive. Yvette received an approved review copy.

I kept the receipt and my copy of the backup procedure.

My proof was no longer sitting alone in my apartment.

On Wednesday, Yvette called me into a small conference room near central stores.

Six claim forms lay on the table. All six listed the same two-hour window on our single-person chamber.

"They overlapped," she said.

"Yes."

"A drafting error could explain a bad time. What explains six certifications after you objected?"

"You'll have to ask Cal."

"I have. He says your initials were a default field."

I looked at the neat AB on the first page.

"I never approved a default signature."

"We found your correction request. Its timestamp comes before the final forms."

She let me read the system history. My crossed-out box had not survived in the current view, but the earlier version still lived in the record store.

Dorian had cleaned the visible screen. He had not cleaned the history.

The Trust stopped the six claims before payment.

Yvette also asked how I had learned the first patient's arrival time. I gave her Lena's name, not the patient's story. She requested the sign-in record from the hospital and arranged for a separate reviewer to contact the patients.

"I don't need you calling people to collect support," she said.

"I wouldn't know what to ask."

"That can be an advantage. You told us what you saw. Now other people get to tell us what they saw."

She placed my equipment chart beside Lena's arrival sheet. The gap between 7:54 and 8:19 looked very small on the table. It had been large enough to cost me my job.

For the first time, I could point to a result larger than my own loss.

Then Yvette put down a second sheet.

It was a claim from Avra Annex, a satellite clinic west of Tucson.

"Did you work there?"

"No. It wasn't open yet."

"Did you support its equipment remotely?"

"I checked a new chamber at a storage building once. That was the whole assignment."

"Which chamber?"

"HB-204."

She tapped a box on the claim.

That same serial number appeared under equipment used.

"Maybe they opened without telling me," I said.

"Maybe. We're checking that."

"What's the treatment date?"

She turned the page so I could see it.

It was three weeks after my warehouse test.

"How many?" I asked.

Yvette reached into her folder and placed a new list beside the claim.

"Two hundred fourteen claimed treatments, spread across forty-one dates."