I'm Not a Detective

The crime rate in Japan is very low, but the number of missing people every year is about 85,000.

This is official statistics. Judging from the working ability and efficiency of the Japanese police, the actual number of missing people should be far higher, but it is difficult to determine how many people have disappeared.

Two missing people were killed today, one in the morning and one in the afternoon.

No one can sleep at the Hirano Main Police Station tonight. The whole building is brightly lit, and police cars flashing red and blue lights are constantly coming in and out. The search headquarters has been established, and all the elite soldiers of the Hirano Search Division have been assembled. They vowed to Find the culprit before he is scolded as a pig.

This is different from the previous cases. A bombing case, or a serial bombing case, can easily make national news. It is very different in nature from an ordinary homicide case in which one or two people are killed.

Nakano Eri is now the "strong general" of the Hirano Police Station. There are three groups of people under her. They were also assigned tasks at the search headquarters meeting. She immediately went to invite the "elite soldier" Takeshi Nanabahara and asked him to assist in the analysis. According to the circumstances of the case, strive for additional layers of insurance.

Safety is guaranteed when staying at the police station. I guess the prisoner is not crazy enough to bomb the police station. In addition, there are consulting fees available. It was quite pleasant to work with Eri Nakano before. Takeshi Nanabahara brought Qingmi Ruri here. Just for fun, browse through the case information and see if you can provide some suggestions for arresting the prisoner.

The first incident occurred at 9:32 this morning. On a busy commercial street outside the city center, a man suddenly rushed out of an alley with an improvised bomb tied to his back, crying "Help!" , "Help me", "Please, please help me cut the blue line" and the like, holding a pair of scissors and looking for someone to help defuse the bomb, but they only frightened the people around and fled in all directions, and there was no demolition at the scene. Bomb expert, no one dares or wants to help.

About five minutes later, there was a huge muffled sound. In front of everyone, the man screamed in despair. His back exploded. He flew out, bloody and bloody, and died on the spot. By the way, it affected several people around him, causing three people to die. Minor injuries, including minor burns to many people's respiratory tracts, and a larger-scale panic attack, causing dozens of people to smash their heads, scrape their knees, and twist their ankles.

"The explosive turned out to be ammonium nitrate glycerin. I asked why the sound was so weird." Takeshi Nanabahara looked at the information and thought about the scene at that time, which solved a small doubt he had before.

The first case occurred earlier, and the forensics department has completed the on-site investigation and search. It is too tragic not to mention the remains of the victim, but fragments of the improvised bomb have been found, and the appearance of the bomb has probably been restored. The explosives The test was also completed, and it was rare that the efficiency was higher.

"What is ammonium nitrate glycerin?" Qingmi Ruri was watching the criminal police officers coming and going in the big office. They had an elite demeanor and their beautiful big eyes were full of envy. She wanted to join them and work together. When she heard that Seven Yuan Wu came back to his senses after speaking, and jotted down the key points of knowledge - when ammonium nitrate glycerin explodes, it sounds like a super loud fart from a distance.

Takeshi Nanahara also became interested in this matter, and went to take a closer look at the photos of bomb fragments found by the forensics class from the first crime scene, and casually explained: "An explosive that is easy to synthesize and can release toxic gases." . The disadvantage is probably that it is relatively weak in power, and it is more dangerous when synthesized by hand. It is easy to kill yourself first. The advantage is that it is difficult to trace the source."

Qingjian Liuli didn't understand, and couldn't understand the string of chemical terms in the information, and asked curiously: "Why is it so difficult to trace the source?"

"Because all the materials can be obtained legally, and the main material is fatty pork. Even if you buy a hundred kilograms at a time, no one will suspect that you want to blow up others, and it is impossible to record it."

"Fat pork can also kill people?" Qingjian Liuli was stunned, thinking of twice-cooked pork, which she thought was the most delicious fatty pork, but she never expected that such a delicious thing could be turned into a murderous weapon.

"Of course, everything in this world can be used as a weapon. As long as you add caustic soda to the fattened pork oil, you can get soap and glycerin, and then mix nitric acid and sulfuric acid in a ratio of 3:3:4..." Takeshi Nanahara said casually. He stopped talking, "Forget it, I won't go into details with you, lest you turn around and blow yourself up, but all the materials required for this kind of explosive can be separated or synthesized by yourself using daily necessities at home, and you can easily avoid control. .”

After a pause, he added, "If you really can't figure it out, you can think of this explosive formula as Nobel's 'Dynamite formula'. It is said that Nobel only went to elementary school and had no interest in science. , it was because he was not afraid of death and dared to mix nitroglycerine with various things that he finally became rich. Today's prisoners are the same, using an outdated low-power explosive that can be mixed by hand. "

In fact, Qingjian Liuli still didn’t quite understand. She didn’t know what the Dynamax formula was, but in order not to appear too ignorant, she suddenly realized: “So that’s it…”

Explosives are difficult to track, so it seems that the only clues can be found from the victims, but she found that Takeshi Nanahara was still looking at the fragments of the bomb, and she couldn't help but wonder: "Can we find clues in these fragments?"

Takeshi Nanahara shook his head: "No, they are all rough handmade products. From the opening rods, fixed bolts to plugs, medicine pools, and igniters, they all look homemade, with obvious traces of hand polishing, but combined with explosives , can already explain a problem.”

"what is the problem?"

Takeshi Nanabaru said with a smile: "The prisoner is most likely self-taught, using old-fashioned textbooks, and is a little crazy. He is not afraid of death at all. With such a rough production, he is very likely to blow himself up or blow himself up before committing the crime." be hospitalized."

Qingjian Liuli looked at him speechlessly. After a long time of analysis, he came up with nothing. Prisoners were bombing around the city center. You said he was mentally normal, is that possible?

She was speechless for a moment, then looked at the restored simple picture of the bomb, and asked a little strangely: "Okay, let's just treat the prisoner as a bit crazy, but he also installed a timer on the bomb and gave it to the victim. A pair of scissors, and he asked someone to help him cut the wires... What is he trying to do? If someone really helps cut the wires, can the bomb really be defused? "

Takeshi Nanabahara looked at the restoration diagram of the bomb timer, nodded slightly and said: "Theoretically, if you can cut it right, you can indeed make the bomb ineffective. As for what he is planning..."

Qing Jian Liuli became energetic and solved a puzzle that had puzzled her for a long time. She asked excitedly: "Can it really stop? I thought it was made up in movies and TV series."

"Art comes from life. There are adaptations in that part, but it is definitely not made up." Takeshi Nanabahara pointed at the restored diagram of the time bomb and said, "In the simplest terms, a timer is a parallel circuit with two branches. , the detonator is placed on one of the branches, and the other branch is a simple wire.

It is explained in science textbooks that if in a parallel structure, one of the two branches has a resistor, which is the timed initiator, and the other branch has no resistor, all the current will go through the non-resistive branch, and the igniter will not get the The current will not work, and the bomb will not be able to detonate at this time. We can only wait until the time comes, and the mechanical or electronic structure of the detonator takes effect, causing the resistance to disappear and the current to flow into this branch to activate the igniter. The igniter ignites the charge pool, causing A series of explosive reactions.

So if you cut the wires right, you could theoretically stop the bomb from detonating. "

Qingjian Liuli understood and felt that it was not difficult to defuse the bomb. She immediately said excitedly: "Is it that simple? Can't I just cut off all the wires? Or just pull out the battery, so that the timer will run out of power. It won’t explode either!”

Takeshi Nanahara looked at her and couldn't help but smile: "You are really a genius. If the prisoner didn't install a set of capacitive circuits to detect the voltage, it would indeed be possible, but the greater possibility is that the prisoner must have installed it and the voltage would be unstable. In an instant, you will be blown up to the sky."

Oh, by the way, what this kid is talking about is the most simplified situation. The prisoner is definitely not that stupid. He will definitely install some other gadgets and even design several sets of current loops to prevent others from cutting wires and smashing timers. Now, take the bomb away from the body or simply pick out the battery.

But having said that, no wonder high school is beyond the scope of compulsory education and can be considered higher education. It turns out that as long as you graduate from high school, you are enough to go out and commit crimes!

What high school students learn is a bit powerful. If you are not afraid of death, you can make your own time bomb after learning it.

Qingjian Ruri completely understood it, and gave up the idea of ​​changing her job as a bomb disposal expert, and planned to go back and continue to strengthen her self-tutoring. She must learn high school knowledge well, otherwise she would be despised even as a prisoner, let alone a detective or criminal police officer. .

She quickly changed the topic and looked at those colorful photos of wires and said: "If it is really possible for a bomb to stop working by cutting wires, did the prisoner give the victim scissors and ask him to call for help? Did he deliberately do this? Different colors of wires are used... No, the time bomb in the movie seems to have a bunch of colorful wires, why is that?"

"There is no problem in this aspect, because everyone knows that bombs are super dangerous items. They cannot be assembled and placed in their homes or carried with them on a daily basis. That is not preparing to commit a crime, but wanting to commit suicide. Therefore, they are only temporarily assembled when they are needed. If the wires are not segregated, the prisoner may mix up and connect the wrong wires when connecting the power supply, igniter, spare igniter, ignition powder magazine, failed ignition powder magazine, trigger and timer together. He blew himself up."

Takeshi Nanabaru touched his chin and said, "But why did the prisoner allow the victim to ask for help and even gave him tools? It is indeed strange. There should be some purpose, but what the purpose is, it is difficult to judge at the moment."

Qing Jian Liuli's mind immediately flashed a dark shadow, and she asked warily: "Is it the mysterious person X? He is out to commit crimes for fun again?"

"Who is the mysterious person

Only then did Qingjian Liuli remember that she had given this code name herself and had not told Takeshi Nanahara yet, so she quickly said: "He was the accomplice in the last suicide fraud case. He also sent you something. Didn't you say that he was a perverted entertainer? Is he guilty? Could it be that he tied a bomb to the victim this time and wanted to watch the victim struggle for fun? "

"Him?" Takeshi Nanahara was also very impressed by this person, but he touched his chin and thought for a moment, then said in deep thought, "Probably not. Last time, he induced others to commit crimes, and personally went into battle to kidnap people and bombs... and the last time The characteristics shown are not consistent, so the suspicion is not high."

Qingjian Liuli also touched her chin and thought about it, and felt that it made sense. The mysterious person big.

She quickly went to find the victim's information and said: "Then let's quickly take a look at the victim's situation. Although it may be a randomly selected victim, the criminals have kidnapped the victim, at least they can leave some clues. , you can look for clues from here."

She was very enthusiastic, even more enthusiastic than the detectives. She wanted to solve the case actively, and at least she wanted to make a contribution. But before she could finish her words, the detectives in the big office suddenly became commotion. One of them covered the phone and shouted excitedly: "Oguri There is news from the police department, the prisoner called and made a request!"