If the letter was deliberately aged to lure Gabriel Adams to the Blue Bar, then the killer must have come here first to find the "mailbox" and send the letter.

"I've never encountered anyone like Officer Gregory coming here to look for desks," Professor Leonard Carter's answer was disappointing.

"How about I help you ask around and see if any other teachers have come across something like this?"

"If it's not too much trouble, could you ask now? Not everyone has left work yet," William Williams said.

Professor Leonard Carter agreed to ask the logistics team. Fiona Bennett and William Williams waited for twenty minutes, and then there was an answer.

About two weeks before Gabriel Adams came, someone else had also come to look at the desks, but he didn't take any of them.

William Williams and Fiona Bennett exchanged glances, both seeing excitement in each other's eyes. Especially Fiona Bennett, who thought through gritted teeth, Finally caught your tail.

They asked further about the person's appearance, but it turned out he was wearing a mask. Male, medium build, not fat. By this standard, the vast majority of male students in the training class fit the description.

It was Fiona Bennett who thought to ask about his accent. The man spoke Mandarin, and Shanghainese people often have a noticeable accent when speaking Mandarin, but this man's Mandarin made him seem like he wasn't local. Fiona Bennett trembled with excitement—if they narrowed it down among the male students in the training class, there were only two suspects left: Matthew Mitchell and Christopher Brooks.

Of these two, Matthew Mitchell was more suspicious. Because Gabriel Adams had previously collected handwriting samples from everyone in the training class to compare with suspects A and B—except for Matthew Mitchell. He wasn't a doctor, so he couldn't get a handwriting sample.

"I've already contacted Matthew Mitchell and arranged to meet him next week," William Williams said. "By then, I'll find a way to get his handwriting."

Sometimes clues appear out of nowhere. Fiona Bennett didn't know why, but she felt it was some kind of omen.

Later that same day, after visiting Yuying Experimental School, Fiona Bennett received a strange text message.

The sender was a string of numbers that was clearly not a phone number, apparently using some kind of software to avoid being traced. The message read:

1993.10.9, Fenghai Hospital, Shirley Wright, blood test report. 1997.11.12, Wenhua Hospital, Susan Wright, blood test report.

Receiving this message gave Fiona Bennett goosebumps all over.

So, there had been a pair of eyes watching her all along, though seemingly without malice.

Who was this person?

Were they someone with inside knowledge of the Susan Wright case?

Could it be one of the classmates?

Why didn't they just come out and say what they knew, instead of giving vague clues for her to investigate herself? And what was the connection between Susan Wright's case and her sister Shirley Wright?

5

Looking up medical records from years ago would have been easy for Fiona Bennett thanks to her network, but now she couldn't use it, because her network was actually Frank Bishop's network, and the events at The Adams Family were still fresh in everyone's mind. Fortunately, William Williams also had plenty of social resources and connections, and eventually got in touch with a doctor in the medical records department.

William Williams originally didn't want Fiona Bennett to come to Fenghai Hospital, worried someone would recognize her and inform Frank Bishop. Fiona Bennett refused to stay away. She wore a mask into the hospital, covering half her face.

Their contact was a female doctor with thick glasses, clearly someone who had managed documents for years, with the look to match. William Williams exchanged a few polite words, then said they were looking for a blood test report for an inpatient from 1993, probably done on October 9th.

"That early?" The doctor was a bit surprised.

"Yes, sorry to trouble you."

"Is there... a problem with the treatment?" the doctor asked cautiously.

"It doesn't involve any medical dispute," William Williams quickly reassured her. "We won't cause you or the hospital any trouble, don't worry."

The doctor gave them a suspicious look, then went to look for the records.

One blood test report for Shirley Wright, one for Susan Wright. What big secret would be revealed when these two reports were put together? William Williams and Fiona Bennett were very curious. They had discussed it at length, with many guesses, but none seemed plausible. Surely Shirley Wright wasn't murdered too, by the same person who killed Susan Wright, using the same poison, and it would show up in the blood test?

It took some effort to find medical records from over a decade ago. William Williams and Fiona Bennett sat waiting in the records room. To be honest, Fiona Bennett was worried the door would suddenly burst open and a group of psychiatric nurses would pin her down and drag her away.

The door opened, and the female doctor came in with a thick medical file.

"Which day's blood test report?"

"October 9th, 1993," William Williams repeated. The doctor opened the file, and froze at the first page.

"What date did you say?" she asked again.

"October 9th, 1993."

"You must be mistaken, that date can't be right," she exclaimed. "The patient died on October 3rd that year!"

She kept flipping through the file.

"Sent to the crematorium on the 4th. By the 9th, the body had already been cremated—how could there be a blood test report from then!"

William Williams and Fiona Bennett were stunned. Could the date in the text message be wrong?

"Well... maybe we could look at her other blood test reports?"

The doctor flipped through the file casually, then said, "Why don't you take a look yourselves."

She turned to the last page, then closed the file and handed it to William Williams. Halfway through, she suddenly said "Huh?" and pulled the file back, flipping again to the last page.

"This is really strange," she muttered, comparing it to the first page. "No mistake, the person died on the 3rd, but there really is a blood test slip from the 9th!"

After death, it's obviously impossible to draw blood for testing, so this couldn't just be a simple date error. Since the text message specifically pointed them to this report, there must be some hidden meaning. Setting aside that mystery, the blood test report itself was noteworthy. The report showed that Shirley Wright's blood contained a high concentration of parasite eggs!

William Williams had known the hospital's diagnosis of Shirley Wright back then, and now, together with Fiona Bennett, he read through the entire file again. The diagnosis of parasites had never come up before. Shirley Wright had had many blood tests during her illness, but except for this mysterious posthumous report, none of the others specifically tested for parasite eggs.

"If it weren't for the same name, I'd think this test result was filed in the wrong record," the doctor said.

"Is it possible to ask the attending physician from back then? Is that doctor still at the hospital?" Fiona Bennett asked.

The attending physician was still there, and the female doctor was also curious to get to the bottom of it, so she quickly called an internal line. Even after so many years, the case was so unusual that as soon as Shirley Wright's name was mentioned, the doctor remembered. The test was indeed done after Shirley Wright died, but the blood wasn't drawn postmortem.

Shirley Wright had had her blood drawn many times during her hospitalization, even the day before she died. And after a patient's blood sample was tested, the hospital wouldn't discard it immediately, but would keep it for about a week before disposal. Seven days after Shirley Wright's death, Adrian Wright came to the hospital and asked the attending physician to test the preserved blood sample again, specifically for parasites. Although the doctor didn't understand why the family would make such a request, the samples were kept for just such situations, so he agreed. When the results came back, the doctor was stunned. Shirley Wright's blood contained a large number of parasite eggs, and no one had thought to check for that before. Normally, if there are parasite eggs in the human body, they're in the intestines, ingested—how could they end up in the blood?

After the results came out, the body had already been cremated. Based on this alone, it couldn't be concluded that the parasites in the blood were related to Shirley Wright's death, but the hospital was inevitably put in a passive position. The attending physician still remembered that when Adrian Wright received the report, his face turned ashen, his hands shook, and he left without saying a word. The silence felt to the doctor like the calm before a volcanic eruption. He thought a big scene was inevitable and had already reported it to the hospital leadership and prepared a series of countermeasures. But in the end, Adrian Wright never came back to make trouble.

Fiona Bennett and William Williams couldn't understand how, as a father, Adrian Wright could remain so "calm." And how did he suddenly think to request a parasite test? And after more than ten years, someone was now prompting them to look at this blood test report—what was their purpose? Both of them thought that after investigating the second clue from the text message, they would have an answer.

They were wrong.