In this way, Yan Xiyue had no way to find out that someone was secretly poisoning.

Jiang Bai had several questions in his heart.

First, the murderer has mastered the rules of the fast food restaurant, and if it is not for monitoring, he will almost be unaware.

Maybe this person has a connection with the clerk of the fast food restaurant, maybe he is a regular customer, just ask.

Fast food restaurants are busy mainly because of takeout, and there are not many dine-in restaurants after all.

Second, where the unknown composition of the poison came from, according to the hospital, is something that has not yet been fully studied.

The murderer can take care of such things, and even get them, and his identity is not simple.

Third, the monitoring clarity is not enough, but Jiang Bai can still recognize that the test tube held by the murderer does not look like the style in the school laboratory.

It would also be an important clue to be able to figure out which laboratory the tube was used for.

In the end, he actually speculated on the identity of the murderer.

Being able to have the above three conditions is enough to prove that this murderer is not simple. Whether it is his network and financial resources, it would have been easy to kill Yan Xiyue.

Why did you choose this method?

Avoid Yan Xiyue's direct death and thus be suspected.

This was Jiang Bai's first reaction.

If you use this method, you don't know it. If it weren't for the hospital examination, everyone would just think that Yan Xiyue was overtired.

When the toxins continue to accumulate and produce a large number of side effects, no one will be surprised even if Yan Xiyue dies suddenly.

It's vicious!

Thinking about it this way, he actually has a lot of clues to find.

It's so much that I don't know where to start.

At this time, Jiang Bai received a call from Liu Zifeng.

"Hello? Team Liu, how are you doing over there? ”

Jiang Bai asked when he received the call, Liu Zifeng called, he must have found relevant clues here.

"It's not just the clues, I've found out where the poison came from."

Liu Zifeng said, "However, this is related to another case. ”

"Another case?"

"Well, the drug theft case at the institute."

When he said this, Jiang Bai instantly understood.

Eight achievements are the unknown toxins present in Yan Xiyue's blood.

"I've invited someone from the institute to the criminal police team, are you still investigating at the school?"

Liu Zifeng continued, "I want to merge these two cases, so I'll pick you up right away." ”

"Okay."

Jiang Bai said and hung up the phone.

This time, he didn't refuse Liu Zifeng very much, after all, he had already decided to help Yan Xiyue in his heart.

After a while, Liu Zifeng's car arrived.

After Jiang Bai got into the car, the car started quickly.

"The lab I went to today happened to be working on APTX-075, but only a third of the material they had isolated was left."

Liu Zifeng explained the situation to Jiang Bai in the car, "Although it has not been confirmed, I guess that the toxin on Yan Xiyue's body should be the same as the ingredients of the medicine stolen from the research." ”

"I also found a lot of information here, and the surveillance of the fast food restaurant found that there was a murderer poisoning in the back kitchen."

Jiang Bai said, "It is estimated that this murderer has a connection with the research institute." ”

"Looks like we've both gained."

Liu Zifeng said, with a slight smile on his serious expression.

The situation is not optimistic, but the gains are also good in the bad.

It didn't take long for them to arrive at the criminal police team. Sun Li was waiting in Liu Zifeng's office.

"Captain Liu, what is this for?"

Sun Li saw Liu Zifeng come in with Jiang Bai and felt a little strange.

"Before I say that, I want to make sure that only a small amount of APTX-075 has been isolated from your institute in the city, right?"

Liu Zifeng did not answer directly, but asked rhetorically.

"Captain Liu, don't worry, not only the whole city, but only three laboratories in the country have isolated this substance, and we have isolated the most!"

Sun Li nodded and confirmed, "The remaining two are in the capital, one on the south coast, and neither of them is in this city. ”

"Okay, then I'll tell you now, the part you lost is on this classmate's friend."

Liu Zifeng said, "His friend was poisoned, and the hospital tested for this substance. ”

"What?"

Sun Li looked surprised, "What do you call this classmate?" How did you get this substance? ”

"My name is Jiang Bai, we didn't get it, but someone poisoned my friend."

Jiang Bai replied lightly, "Team Liu, you called me to mean that these two cases are going to be merged into one case, right?" ”

"That's right, the APTX-075 lost in the lab should have been detected on Yan Xiyue's body."

Liu Zifeng said and nodded, "Although it still needs to be confirmed, these two cases can basically be combined." ”

"Jiang Bai, where is your friend now?"

Sun Li said, "I am one of the researchers of the cooperative separation, let me look at the report and I can confirm it. ”

"She's in the hospital, but I've brought the report."

Liu Zifeng said and took out the report.

"Well, that's right, it's really the same substance."

Sun Li carefully read the general properties of this substance, nodded and said.

"Then the two cases are merged."

Liu Zifeng said and began to write a report, "Director Sun, the evidence you have here is limited, I hope to start investigating from Jiang Bai's friends first, what do you think?" ”

"No problem, it will take time for me to report the loss of the medicine. The specific Captain Liu, your arrangement. ”

Sun Li said, his eyes were a little nervous, "We have not long separated this substance, and many of its properties are not clear, so it is best to let Jiang Bai's friends check it in the intensive care unit just in case." ”

"I'll let the hospital know that. Director Sun, you can fill out this form and go back. We'll get back to you. ”

Liu Zifeng nodded while writing the report and said, "Jiang Bai, later, you will merge the evidence you have searched here with mine." ”

"Okay."

Jiang Bai nodded.

"Then please!"

Sun Li said and quickly filled out the form before leaving.

After a while, after the report was written, Liu Zifeng and Jiang Bai integrated the information obtained by both parties.

"Jiang Bai, tell me what you think."

Liu Zifeng said.

"Three ideas."

Jiang Bai said slowly, "How did the first thing get lost, how did the second thing get to our school, and who put the third thing." ”

Jiang Bai raised all the big questions at once.

These three questions connect these two cases.

"Well, I think so too."

Liu Zifeng followed Jiang Bai's train of thought and analyzed, "Let's talk about how the first thing was lost." The monitoring of the institute is clear and tightly managed, and generally speaking, there is no way for outsiders to easily obtain it. ”

"So there's an inner ghost."

Jiang Bai agreed, "The inner ghost contacts hackers and the like, replaces the surveillance footage, and then commits the crime." ”

"I don't know exactly how to get to school."

Liu Zifeng said, "Maybe someone in your school has a relationship with the research laboratory to get this medicine?" ”

"Maybe it's not a simple relationship."

Jiang Bai said, "This kind of thing has not even been studied for traits, it is only available in a few professional medical journals, how did the murderer know that there is such a thing?" ”

It's the latest thing that comes to his mind.

The isolated side effect poison has not even been seen by hospital doctors, let alone people on college campuses.