Suburban Philadelphia, on the third floor of a detached villa.

There is a bedroom on the third floor of the villa, the room is simple and tidy, a wardrobe, a small round table, the chair is pulled out of an arc, a low bed, the futon is neatly placed on the bed, and next to the bed is a low cabinet.

Simple, but harmoniously placed, it is clear that the owner of this bedroom has some obsessive-compulsive disorder.

This room was discovered by Nono first, Nono walked around this villa, most of the rooms in the villa were not locked, and those that were not locked Nono also went in to see them. The floor of the room was almost filled with household garbage such as wine bottles, cigarette cases, and cigarette butts, clothes and pants were casually thrown on the bed, and the walls of the room were almost covered with yellow posters, dirty and messy, with no special value.

Only this room, in terms of location, it is almost the most hidden place in the whole villa, when Nono found it, the room was locked, there was a thin layer of dust in front of the door, and it seemed that no one had come to clean it in the past two days.

After being violently opened by Wei Ji, there was hardly anything in the room.

As a result, Chu Zihang is now moving everything that can be moved, wanting to find some evidence that is not easy to find.

Wei Ji and Nono were next to the bed of the low bed, and they had just moved the low table at the head of the bed, and found something behind it.

Wei Ji held a somewhat sharp broken tooth in his hand, but because it was only a small section, he couldn't specifically determine the source.

"What is this? Dogtooth? Wei Ji said

"That's a human tooth." Nono had already seen that there was only a small sharp part of the tooth, and if she hadn't been able to write some profiles, she probably wouldn't have come to this conclusion that sounded "fake".

"Don't look at that rotten tooth in your hand, let's take a look at this first."

Nono held up a broken ampoule with excitement in his eyes.

Wei Ji didn't suspect that Nono was lying to him, he was just curious that human teeth could be like dogs, but Nono said that his doubts were not important, and instead held up a small bottle with a light in his eyes.

"What is this? Oral dextrose? Wei Ji reached out and wanted to take a closer look.

Nuno slapped his outstretched hand, glanced at him angrily, and said, "Oral glucose, it's really a shame that you can say it, don't move, there is morphine in it." ”

Morphine, the representative medicine of analgesics, some people will say that morphine can relieve pain, and some people will say that it is a drug. Nothing wrong, morphine is one such drug, sometimes like an angel, sometimes like a demon.

"The guy downstairs here said, the doctor is sick, I think this should be a truth, judging from the dose of morphine, the disease he has will also bring him severe pain, the kind of terminal cancer body can't stand the severe pain will be approved to use morphine, but if the doctor has cancer, why do you have such a heart-wrenching experiment?"

If he has cancer, the regular laboratory probably won't let him engage in research on cancer, and then he can only study secretly? This was by no means a reason for him to conduct such an experiment.

"According to the man's statement, most of the wanderers who were captured were healthy, so why expose them to the germs? He said that the Doctor had been sick for a long time, and that the disease would cause something like scales to grow on his chest......"

Nono looked at the room, his thoughts becoming clearer.

Because of his physical abnormality, a person who loves cleanliness and has obsessive-compulsive disorder does not let people help clean his bedroom, he is afraid that people will find out about his illness, or he does not want people to know about his research. His research is related to medicine or biochemistry, which is often expensive and expensive, and it is difficult to maintain without support......

He's not in it for money, he's sick and he needs someone else's help to study his illness! They're taking what they need, or they're on the same page! What exactly does the person who can provide the money need him to study?

The man in the bedroom was awakened by a terrible pain one night, and he was so anxious to get the analgesic as usual that he accidentally broke a bottle of morphine, and he could not fall asleep until he had taken a whole bottle of morphine, and the fragments of the ampoule were forgotten in the dead corner between the cabinet and the wall......

And teeth, skin like scales......

Nono felt like she was about to figure it out, but she couldn't get the final result because she lacked some necessary information.

"Come and see, I might have found something." I don't know when, Chu Zihang has already found the bathroom.

It's bloodstains.

In front of me was a broken mirror, cracked in other directions in the shape of a spider's web along one point, and it was obvious that it was either smashed with a blunt object or with a hand, which was most likely a hand, considering that there were blood stains on the mirror.

Wei Ji looked at it, took the cup on the washbasin cabinet and looked at it, there was a toothbrush in it, and the bristles of the toothbrush were rotten......

"This man's fire is very serious, the toothbrush cup is full of blood, and besides, this person's teeth are too bad, and the bristles of the toothbrush have been brushed like this by him." Wei Ji complained.

"Don't complain, I can't believe that a person who loves cleanliness and has a little obsessive-compulsive disorder would forget to clean up the traces of his life when he leaves here." Nono shook her head, there might be some clues she had overlooked.

"You can take this toothbrush for testing, we should be able to get a lot of information." When Nuo Nuo reasoned, it was obvious that Chu Zihang had also heard it, and he felt that if he got blood, he might be able to get something out of it if he went to a professional laboratory.

"Let's look for it again, if only we could get direct evidence of their crimes." Wei Ji said.

Obviously, a broken tooth, a broken ampoule, and some blood are not key direct evidence, and can only be inferred or completely reconstruct the event.

"How can it be so easy to get those evidence, these people are habitual offenders at a glance, and it is estimated that only the two rookies downstairs will be like this." Seeing that his curiosity had no hope of being satisfied, Nuno also began to complain.

Wait, rookie? She seemed to remember something.

"No, they've already given up here, it's clear that burning this place down is the best solution, but they still let the two rookies downstairs watch here, they must have left something here, or ......" A terrifying thought came to Nono's mind.

Are they drawing us here!?

"There's a car coming outside." Chu Zihang stared at a car shadow in the dark night and spoke.

Not far away, an off-road vehicle drove here, and the powerful headlights burned out two pillars of light in the dark night, but the lights were cold, and the hearts of several people were cold.

Obviously, there are not so many coincidences on the big night, and their target must be here!

"You guys get guns! I'll go down. Wei Ji said, "Since they are back, they must have a goal, they must have what they want, I will go down to negotiate with them, and if you are ready, you can communicate with me in the headset." ”

"No, no, no one knows what they want to do, aren't you going down to die?" When Nono heard this, he was a little flustered for a while.

Chu Zihang also opened his mouth and said: "Yes, you can let me go down, I am better at negotiation than you." ”

Chu Zihang would recall that rainy night countless nights, if he could go back to the past, he would definitely choose to swing his knife with that man and rush to the enemy, instead of being a coward who escaped, he swore that after this, he would never run away from any battle.