Chapter 77: Nathan's Badge
Nathan denied entering the laboratory before anyone accused him of it.
The external auditor interviewed him the next morning through a controlled legal link. I attended only as scientific observer for the incident record. Julian remained outside the questioning chain.
"I attended a contract meeting at Mercer Nova two weeks ago," Nathan said. "I returned the visitor badge to reception when I left."
"Did you watch it destroyed?"
"No."
"Did you take it from the building?"
"No."
The auditor displayed the issue receipt and blank destruction field. Nathan authenticated his signature on the first and said he had never seen the second.
He also offered his itinerary for the day our schedule and storage records changed.
That choice was voluntary. It was not an apology, a confession, or help with the five-year-old investigation. Nathan had an immediate interest in proving he had not entered Mercer Nova.
The itinerary included a Sterling executive meeting, a recorded call with outside counsel, vehicle access at the company garage, and a dinner reservation. Independent time records supported enough of the sequence that he could not have been physically present at our storage vestibule when the visitor identifier appeared.
The auditor did not admit Nathan's own calendar as proof. Each point required a source outside his control. One unverified gap remained between the legal call and the garage record, but it was too short to place him across the city inside Mercer Nova.
"Someone else could have carried your badge," Celeste said from Sterling's counsel table.
Nathan looked at her. "I returned it."
It was the first disagreement between them in the session. It concerned his exposure, not me.
The auditor kept the finding narrow. Nathan had received the badge two weeks earlier. Mercer reception had not recorded destruction. His verified itinerary did not place him at the laboratory during the incident.
No finding established who possessed the physical card afterward.
I asked one question.
"Does the transfer terminal require the card itself?"
The auditor answered after checking the system description. "It requires a valid visitor identifier accepted through the reception-linked service. We have not established whether the original credential was presented."
That distinction removed the easiest accusation.
Nathan's name had entered the manifest because his identity was attached to the number at issuance. The log did not know whose hand used the number later.
"Will you correct the incident report?" he asked.
"It currently says the credential was issued in your name," the auditor replied. "That remains true."
"It should say I was not there."
"Your itinerary finding will appear beside it."
He wanted one fact to erase the other. The final record kept both.
After the interview, Nathan's lawyer requested the badge number be withheld from Mercer employees. The auditor agreed during the active investigation. Privacy did not belong only to people I trusted.
I felt no relief for him.
I felt relief that our process could refuse the wrong conclusion even when the wrong conclusion would have hurt a man who had hurt me.
The reception chain became the next target. The checkout worker's account had processed eleven visitors that day. Ten badges showed destruction confirmations. Nathan's record ended after return.
The auditor compared the visitor identifier used during our incident with the original issuance record. The values matched, but that still did not prove the physical badge survived.
A digital identifier could travel without the object that first carried it.
The auditor ordered a source review of Mercer's reception system, including who could view, reissue, or attach visitor identifiers. No copying instructions or technical credentials entered the report.
Sterling requested a public correction clearing Nathan. The auditor refused. The evidence excluded his physical presence; it did not yet explain how his issued identity reached the transfer request.
Nathan reserved his rights and ended the call.
He had given us an itinerary because his own name was at risk.
The next evidence would decide whether the name had traveled without him.