Everyone took the second miss of the Yan family off the wall and took down the two steel arrows. I examined the two steel arrows, which were deeply embedded in the tiled walls, a force that was clearly not done by man.

I examined the tails of the steel arrows and found that the tails of both steel arrows were intact and there were no marks left by the knocks. Indicates that the steel arrow embedded in the wall was not hit by a hammer.

This reminds me of the long-range sniper arrow I encountered in the Yan Mansion before. At that time, I speculated that it was impossible for a human to shoot an arrow that far away. At that time, Tang Zhenguo said an ancient archery technique called "giant archery", but seeing the two bloody stone holes in the wall of this bathroom, I can be sure that Tang Zhenguo's speculation is wrong.

Tang Zhenguo has broken through the limits of human physique, so his thinking mode has a sense of identity with those forces that are beyond human common sense. But for ordinary people, his sense of identity seems too absurd, and what he identifies with is closer to myths and legends.

So now I can be sure that the murderer possessed some kind of machinery. This mechanical energy catapults arrows with great lethality. I'll say it's a machine, not a crossbow, because it's hard for a crossbow to achieve such a powerful attack.

I looked at the steel arrow and sniffed it. Unfortunately, I couldn't smell anything other than the disgusting smell of blood and the thick mint smell in the air.

Actually, I want to smell if the arrow has a * smell, such a strong attack power, isn't it like a bullet, driven by * deflagration?

I stared at the steel arrow and said to Lao Lu: "Do a smoke test on this steel arrow, if there is a * smell attached to the arrow of the steel arrow, then you can understand the murderer's attack method." ”

Lao Lu nodded, looked at Tang Zhenguo and said, "Zhenguo, I see that you have been silent until now, are you still thinking about that giant archery technique?" ”

Tang Zhenguo shook his head and said, "This woman will not be killed by the giant arrow technique, as far as I know, no one has been able to control an arrow like this pure steel." ”

I smiled and said, "Zhenguo, it seems that we have reached a consensus on this point, I think this steel arrow is launched with extremely modern equipment. And I think the previous long wooden arrows were also fired with this kind of device. Lao Lu, the wooden arrow is still in the evidence room, and you can also do a gunsmoke reaction test, and you can understand whether the long-range attack that manpower can't do is human-driven or mechanically pushed. ”

Tang Zhenguo didn't speak, just looked at the steel arrow and was stunned.

I examined the body of the second lady of the Yan family again, and found bruises on the neck in addition to the two penetrating wounds on the surface.

But this bruise on the neck was obviously not left by the second miss of the Yan family in front of her, nor was it the fatal injury of the second miss of the Yan family. The bruises were left after her death when she was strangled by her left hand around her neck and lifted off the ground against a wall.

This can very well explain why the second miss of the Yan family is hanging on the wall. Because the murderer raised the second miss of the Yan family with his left hand, and used the machine with his right hand to shoot the steel arrow into the heart of the second miss of the Yan family, and nailed it to the wall. After that, he used that strange machine to penetrate the head of the second miss of the Yan family.

But in any case, the second miss of the Yan family was subjected to such cruel abuse after her death, but what was the cause of her death?

Because no fatal injuries were found, I judged that the second lady of the Yan family was poisoned to death. However, the conditions at the scene made it impossible for me to detect the cause of the poisoning and how it was poisoned.

However, I speculate that it is very unlikely that Miss Yan Jia's second miss was poisoned orally, because if the killer poisoned Miss Yan's drinking water or food, it would be difficult for the murderer to obtain her body after Miss Yan's second miss was poisoned and died.

So I believe that Miss Yan Jiaer is inhalation poisoning. The murderer is strong and strong, and if he used a poison mixed with ether to cover the mouth and nose of the second miss of the Yan family, then it is very likely that the second miss of the Yan family was poisoned and died after falling into a coma.

If it is caused by death in this way, then I believe that toxic substances can be detected in the respiratory tract of Miss Yan Jiaer.

The corpse of the second lady of the Yan family, the two steel arrows and the wooden arrows before were all sent to the forensic center.

The results of the appraisal were not long in coming.

After the steel arrow passed the smoke reaction test, it was indeed found that the residue of * was found. It seems that my speculation is correct, that the steel arrow was shot out by means of a special instrument using *.

But on the wooden arrows left in the Yan Mansion before, no * residue was detected, could it be that the legendary giant archery technique is real? Of course, I was still skeptical, because even if no remnants of * were found, the wooden arrow could still be fired through a giant crossbow. In short, I don't believe that human beings can pull a bow and shoot arrows to achieve such great power.

Sure enough, the residue of ether was found in the body of the second miss of the Yan family, and an unknown substance was also discovered.

Later, after the joint screening of several experts, a terrifying conclusion was reached.

Miss Yan died of VX nerve agent poisoning.

When I learned of this, I was filled with fear.

This VX nerve agent, scientific name S-(2-diisopropylaminoethyl)-ethyl methylthiophosphonate, is a more toxic nerve agent than sarin and is one of the deadliest chemical weapons. It is also a colorless, odorless, oily liquid that turns into a gas once it comes into contact with oxygen. Industrial products are yellowish, yellow or brown, and a small amount of mercaptan will be decomposed during storage, so it has a foul smell, mainly because of the liquid to cause poison on the ground and objects, which can be transmitted through the air or water source, and is almost imperceptible. Human skin contact with it or inhalation can cause poisoning, and headache and nausea are the main symptoms of infection with this poisonous gas. VX gas can cause central nervous system disorders, respiratory arrest, and eventually death.

From the previous threat to Yan Chengli's family, we were sniped by wooden arrows, to the explosion of the radiology department of the hospital and the death of the nurse and the second miss of the Yan family, to the current VX nerve agent. The killing angel Cyra is opening its cruel minions step by step.

If Yan Chengli's family was threatened before, it can only be regarded as a criminal case. But now the appearance of VX nerve agent is not a simple criminal case, because if the killer has a large amount of VX nerve agent, then the threat will spread to the whole city.

Lao Lu and Tang Zhenguo didn't have any concept of this VX nerve agent, and they made very puzzled expressions when they looked at me holding the practice report of the second lady of the Yan family and were stunned.

Lao Lu was the first to speak: "Yan Huijiao (the second lady of the Yan family) died, is it strange? What the hell is this VX nerve agent? ”

I heard Lao Lu's voice, and there was obviously only doubt in his tone, and he didn't feel fear or panic. But I'm sure he must have felt panicked after I explained it.

I took the heavy report and said, "I think this killing angel Cyra really lives up to its name, and this VX nerve agent can easily destroy our city." ”

Lao Lu and Tang Zhenguo looked at me with wide eyes at the same time and said, "What? ”

Although I was worried and uneasy in my heart, I still tried to keep calm and said, "This VX nerve agent is more terrifying than sarin gas, and the power and toxicity are also more intense. In the previous American blockbuster "Brave Island", it was to subdue the Kong terrorists to release this poison. ”

Lao Lu frowned and said, "How powerful is this VX nerve agent?" ”

"VX is a more toxic nerve agent than sarin, and it is known as the most terrible chemical weapon ever produced," I said. It is a colorless, odorless, oily liquid that turns into a gas once it comes into contact with oxygen. Industrial products are yellowish, yellow or brown, and a small amount of mercaptan will be decomposed during storage, so it has a foul smell, mainly because of the liquid to cause poison on the ground and objects, which can be transmitted through the air or water source, and is almost imperceptible. Human skin contact with it or inhalation can cause poisoning, and headache and nausea are the main symptoms of infection with this poisonous gas. VX gas can cause central nervous system disorders, respiratory arrest, and eventually death. VX is a transliteration, it is a poison first discovered by the British in 1952, and then the Americans selected VX as the focus of the development of chemical warfare agents, the scientific name of VX poison is S-(2-diisopropylaminoethyl)-methylthiophosphonate ethyl ester, this substance is probably the longest name of the poison. Before the collapse of the Soviet Union, it claimed to have the world's largest chemical weapons arsenal, and it was calculated that its chemical weapons stockpile could kill each of the 6 billion people on the planet 1,022 times. ”

When I finished saying this, I saw Lao Lu and Tang Zhenguo's Adam's apple squirming up and down involuntarily. It seems that they already have the concept of this terrible poison in their minds now.

I observed Tang Zhenguo, because Tang Zhenguo now has too many people and feelings to protect. His daughter, his lover, his relatives, these are all emotions that he can't let go.

I know that every time he encounters such an uncontrollable danger, he will try to stop it with a kind of personal heroism. Especially before, when I lied to him that there was a zombie virus, he had the courage and behavior to go to the meeting alone and destroy the laboratory.

Tang Zhenguo seemed to sense that I was observing him, so his face became much calmer, and there was a resolute light in his bright eyes. I'm going to give this light a name, and it's like seeing death as home.

"Do you know where that bastard is?" Tang Zhenguo said in a dull tone.

I know what Tang Zhenguo is thinking, and he plans to let me take him to punish evil and promote good. However, I really can't know the location of the murderer right now. So I shook my head a little helplessly.

"I know, there must be one person who knows." Tang Zhenguo's tone was very firm, and I knew what he meant by this.

It's just that Lao Lu looked at us in astonishment, and didn't understand the mystery in our conversation.