The moment the bomb exploded, the four members of the special case team and the bomb disposal expert all thought at the same time: Oops, this life is gone.
There was a flash of fire and thick smoke everywhere. Although the bomb exploded, it had very little power. It went off like a big firecracker. Except for the bomb disposal expert's hand being injured, no one was killed. Even so,
The four members of the special case team were still shocked and broke into a cold sweat. The police from outside rushed in after hearing the sound and hurriedly carried the injured and screaming bomb disposal expert onto a stretcher.
It was a false alarm, with confetti flying in the air and a smell of sulfur filling the air.
Hualong said: What's going on? What does this mean?
Professor Liang: This should be a warning from the murderer!
Police chief: A comprehensive inspection of the ammunition engineering student dormitories and laboratories should be carried out.
Bao Zhan: A person who can make bombs will not have such low IQ that we will find the explosives he hides under the bed.
Su Mei: I’m scared to death. What should we do next?
Professor Liang: Pick up trash.
The special case team immediately took action at the explosion site. They wanted to find all the fragments of the bomb, and then piece them together to look for clues left by the murderer. If there are no witnesses or surveillance videos, it will be very difficult to solve the explosion. This is because
After the explosion, the evidence will be wiped out with the explosion, and the rescue measures of the fire brigade and medical staff will also damage the scene.
After the on-site inspection work was completed, Su Mei used computer animation to restore the entire explosion process. A lecturer in ammunition engineering described the manufacturing technology of this kind of moonlight bomb in detail. Moonlight bombs must be made at night, and the tools used are also very simple.
An ordinary thermometer is used as the detonating device. After the bomb is placed, the mercury rises with the temperature of the surrounding environment, and gradually reaches the detonation point after the sun comes out. The murderer did not place many explosives, which is why the bomb is not very powerful. Liang
The professor analyzed that this was done intentionally by the murderer, and the purpose was not to kill but to frighten the police.
This bomb was a warning. In this way, the murderer told the special case team that he could blow them up and hoped that the police would retreat.
Su Mei said: The next explosion will probably escalate.
Hualong said: "Obviously, we can fight hard and won't back down. Who calls us a special case team?"
The explosives were placed in a cardboard box, which was a sanitary napkin packaging box. Bao Zhan picked up a fragment of the cardboard box with tweezers, put his nose close to smell it, raised his face, closed his eyes and said: In addition to the smell of gunpowder smoke and sulfur, there is also
fragrance.
Professor Liang said: Xiaobao, it’s not that I don’t believe your nose, but this carton is very important to us. We need to do separation testing and smoke reaction experiments immediately.
Smoke reaction is a kind of identification made by the police regarding the residue of explosion or shooting during detection.
In the Hong Kong 422 armored truck robbery case, the police used gunpowder smoke reaction to confirm that there was shooting residue on the sleeve of a piece of clothing, thus finding the owner of the clothing, who was the real culprit of the robbery. In the assassination of President Kennedy in the United States, a
A bullet with the arms serial number c2788 became a physical evidence. In addition to fingerprints, gunpowder residue was also a key piece of evidence to identify the murderer.
Bao Zhan first sprayed some organic solvents on the filter paper, such as ethanol, acetone, carbon tetrachloride, etc., then covered the filter paper on the cardboard fragments to extract, and then separated out the gunpowder particles, metal powder, and combustion products. The rest is
As long as the murderer touches the carton with the residue on his hands, the police will be able to find clues through scientific and technical means.
Bao Zhan used physical examination, which has the advantage of not destroying physical evidence.
However, Bao Zhan tried atomic absorption spectrometry and fluorescence analysis one after another, but failed to find any hand residue on the cardboard fragments, but he was convinced that he smelled a fragrance, which should have been left by the murderer.
Bao Zhan used an electron microscope to observe and found no traces of cosmetics. This result made him disappointed and puzzled as to where the fragrance came from.
In Bao Zhan's last attempt, he used medium molecule activation analysis to finally confirm that the scent came from a perfume.
Su Mei asked: Could it be that the person who made and placed the bomb was a woman?
Professor Liang: In short, the person who planted the bomb had perfume on his hand. Regardless of whether he was a man or a woman, when the murderer put down the carton, the perfume on his hand was also left on the carton. In this world, as long as a crime is committed, it will be left behind.
Traces below. Throughout the world, the position of matter is always changing. There are traces of star explosions hundreds of millions of years ago, not to mention the bomb we have witnessed with our own eyes.
Su Mei said: This carton is a bit perverted. Who would buy a box of sanitary napkins?
Hualong said: There is also the source of the explosives. These are the focus of our next investigation.
Although there is only such a small amount of evidence, there is a glimmer of light in the case, and everyone vaguely feels that the murderer may be a woman.
Professor Liang arranged the work, and everyone acted non-stop. The person in charge of the police conducted a lot of investigation work, hoping to find witnesses. The police visited the dormitory directors of each dormitory to investigate who had seen the cardboard box on the night of the moonlight bomb incident.
, and the person holding the cardboard box. Professor Liang specifically asked the police chief to pay attention to finding the source of the perfume. The dormitory of the campus beauty and the dormitory of Lao Goose were the key targets of investigation. Perfume was found in both dormitories. The boss of the dormitory was also included in the police's investigation.
Suspicious sight, he left the dormitory on the night of the incident, and claimed to the police that he spent the night playing World of Warcraft in an Internet cafe outside the school.
Professor Liang asked Su Mei to verify the words of the dormitory boss, and asked Bao Zhan to analyze and compare the perfumes in the two dormitories with the perfumes on the bomb cartons. The identification results take time, and under certain conditions, the fragrance of high-end perfumes should remain constant.
Less than 70 hours, and no less than 60 hours for floral scents. Most of the perfumes used by students are low-quality perfumes that can last for 24 hours. Therefore, there is not much time left for Bao. It won’t take long for the police to obtain this clue.
, will disappear into the air.
The investigators who secretly monitored Lao Ge reported that on the night of the explosion, Lao Ge had been sleeping in the dormitory. The next morning, this always lazy and unkempt guy did a lot of things. He cut his hair, got a new hairstyle, and even sprayed the boss of the dormitory.
He put on perfume, put on new clothes, and took a bath for the first time. His classmates reported that Lao Ge had no habit of taking a bath. Lao Ge’s reason was that he wanted to maintain his original taste and true qualities as a man.
In addition to these details of life, there is one strange thing. The investigator said that Lao Goose bought a lot of candles, dozens of them, and didn't know what they were used for.
The special case team asked investigators to be more vigilant and continue surveillance. The candles were most likely used to make bombs.
At night, these candles come in handy.
Lao Goose used dozens of candles to place a heart pattern under the school belle's dormitory. Many students stopped to watch. Many windows in the girls' dormitory were opened, and some curious girls stuck their heads out to watch the fun. Investigator
Reporting to the special case team, four members of the special case team arrived immediately. Professor Liang asked Hualong to prepare a net gun. Once Lao Goose behaves in an extreme manner, he will be arrested immediately.
Lao Goose looked like he was risking his life. He pointed at the four members of the special case team and said: Look, the cops are here, cheering me on.
The students who were watching burst into laughter. The four members of the special case team had expressionless faces, waiting to see what Lao Goose would do next.
Old Goose lit the candle with a lighter, and in the night, a heart was burning.
This kind of romantic courtship is not uncommon on campus. College students are very creative in order to express their love.
Old Goose covered his mouth with his hands and shouted the name of the school beauty. The window of the school beauty's dormitory was never opened. He was tired of shouting, so he squatted on the ground and started shouting "I love you" one after another. When shouting, he still had to stand upright.
Get up and look funny.
Everyone started to boo, and some girls took out their mobile phones to take pictures of Lao Goose.
The old goose shouted loudly: I love you.
The school belle was so annoyed that she opened the window and said, "I'm so annoyed."
The old goose said: Come down, please. Look, so many people are waiting for you.
The school beauty said: If you have the ability, you can strip naked and run around naked, and I will come down.
The onlookers laughed and started to applaud. Lao Goose stood up suddenly, took off his coat, and threw it to the ground. He gritted his teeth and said: Take it off, run naked, run naked, for love, I will fight.
The applause around him became more intense, and the students present encouraged Lao Goose to run naked.
Su Mei said to Hua Long and Bao Zhan, "I really miss my college days, so why wouldn't anyone run naked for me?"
Hua Long said: Yes, otherwise you would have married a long time ago.
Bao Zhan said: Old Goose is very courageous. Even if I were killed, I wouldn't be able to do such a thing.
Old Goose took off his clothes one by one, and in the end he only had a pair of underwear left. There was a bulge in his underwear. It seemed that this perverted guy had put on another sanitary napkin today. The weather was very cold, and Old Goose was shaking with his arms folded in the cold.
He said to himself, "Run, run, you won't be cold anymore after just one run." The old goose started running naked, and everyone applauded to cheer him. He ran around the campus, and when he stopped out of breath, he lost his shoes.
, a white thing flung out from the shoe.
When Old Goose put on his shoes, a classmate looked down and said with a bad smile, Old Goose, your sanitary napkin fell off.
Hualong said: Damn it, this grandson of Lao Goose actually uses sanitary napkins as insoles.
The old goose opened his mouth and began to shout the name of the school beauty hoarsely: I love you, I ran naked, I am not cold, I am very hot.
Amidst the screams of the girls, the school belle suddenly appeared. She went downstairs and walked to Lao Goose. Lao Goose was so moved that he almost cried. He opened his arms, waiting for the school belle to throw herself into his arms. Korean dramas or love stories appeared in Lao Goose's mind.
In the romantic scene of the play, lovers hug each other and a heart made of candles is burning.
The school beauty did not hug Lao Goose. She frowned and smiled and stretched out her hand. Lao Goose was stunned for a moment, and then took the school beauty's hand.
Old Goose said excitedly: I love you, and I will do anything for you. Marry me.
The school belle said with a straight face: How much is love worth?
The old goose said: priceless.
The school beauty sneered, took out her hand and said: Shit, look at this real world clearly. Without money, it is difficult to move forward. Love in college is just a game and a dream. Break up as soon as you graduate. Wake up. Instead of sitting on your bicycle
Laughing in the back seat, I might as well cry in a BMW. When will I be able to fall in love with you when you are on the Hurun Rich List? I only love rich people. These candles and cheap gadgets just want to
It's ridiculous to impress me. You don't even have a diamond ring and you dare to propose to me. You really insult me. When did you put a heart on a BMW?
The school beauty kicked down a few candles and left coldly, leaving Lao Goose staring at her back blankly.
Lao Ge returned to the dormitory and fell asleep with his head covered. The investigator reported that Lao Ge had been depressed and decadent for several days. It seemed that the words of the school belle had a big impact on him, but the guy quickly cheered up and worked hard to win.
scholarship.
He sighed and said to the boss of the dormitory, it's my fault, not the rejection, I don't even have a ring.
The boss of the dormitory said: Brother, you can't afford a diamond ring, so why not buy a bottle of aphrodisiac potion and put it in when you treat her to dinner? You can treat me to spicy fish tonight, and I can invite the school beauty to the banquet.
Old Goose: I can cook spicy fish myself. Let’s cook it in the dormitory. The key to this dish is that the oil needs to be hot.
Dormitory Boss: Got it, stir-fried green onions, sliced ginger, and some hot sauce.
Lao Goose: When stir-frying, you have to move quickly, swishing, swishing, and lightning fast.
Dormitory Boss: Would you like to add some vinegar? It will taste better.
Old Goose: No, what does it taste like? It still smells like MSG in the end.
Dormitory boss: Have you finished? I didn’t bring any paper.
Old Goose: When buying cakes, I didn’t bring any paper, but I have two sanitary napkins here.
The special case team learned that many students are striving for scholarships. The female principal said that scholarships are used to encourage students to develop in an all-round way, create a positive academic atmosphere, and reward and fund students with both good character and academic performance. Currently, ammunition engineering and
Scholarships for Explosive Technology students are being reviewed.
The special case team decided to use the scholarship to offer a disguised reward to fish the murderer out of the water.
The lecturer said: Many students are limited to theory, including me, a lecturer, who lacks practice. I think there are many students who can make moonlight bombs or sanitary napkin bombs, but there should be only a few who can make both kinds of bombs by one person.
Not many. Students who use scholarships as bait to make moonlight bombs and sanitary napkin bombs are most likely the murderers.
Hualong: I think the key point in the sanitary napkin case is not the sanitary napkin...
Su Mei: Can you not say it so obscenely? This is an explosion.
Bao Zhan said: The source of explosives is crucial.
The female principal and lecturer told the special case team that there were only a small amount of explosives in the school for scientific research experiments, which were stored in the laboratory on the second underground floor. The special case team checked the laboratory and found that the underground building was a straight-through type, with an approach road
, consisting of a main room, an auxiliary room and an air outlet. Each underground laboratory has two entrances and exits, and the doors open outwards.
There are two explosion-related laboratories in the school, one is the Explosion Science and Technology Laboratory, and the other is the Mechanical and Electrical Engineering and Control Laboratory. In addition, there is a Selenium Mountain test area outside the school, which is generally related to explosions.
The experiments are all done there, and there are now two light gas cannons, an underwater explosion test chamber and various explosion testing equipment.
At the case press conference, the special case team analyzed that the murderer should be a student majoring in ammunition engineering and explosive technology. He may have stolen some explosives during experiments, and the bomb may have been made in the laboratory. The murderer had sprayed
The habit of perfume, coupled with the sanitary napkin box, suggests that the murderer may be a female and has access to the laboratory and the dormitory of the deceased's counselor.
Bao Zhan noticed that the female principal also wore perfume, and secretly investigated and learned that the female principal and the deceased counselor had conflicts over issues such as school ethics and management standards. The counselor privately said that the principal was suspected of taking bribes, but Bao Zhan did not find anyone who took bribes.
evidence.
The female principal is highly respected, honest and selfless, and is well-known in the school. She has never been married because she took care of her cousin who suffered from amnesia.
The school has promised students majoring in ammunition engineering and explosive technology that as long as someone can make a sanitary napkin bomb and a moonlight bomb, even if it is limited to feasible theories, the school will award scholarships.
The police sometimes tempt the murderer during the investigation. For example, in the Kaizhou family massacre, the police offered a reward for his arrest. A whistleblower claimed that the deceased was strangled to death by a wire. Only the police and the murderer knew the details of the crime. Therefore, it is a crime to identify this whistleblower.
murderer.
A few days later, the police screened out four suspects based on the theoretical reports submitted by the students: Lao Goose, the school beauty, the boss of the dormitory, and a disabled girl.
The theoretical reports of these four students are all feasible. According to their professional theories, they can create sanitary napkin bombs and moonlight bombs.
The school belle wrote in the paper that spontaneous combustion of sanitary napkins is actually very simple. There are many substances that burn when exposed to water, such as potassium, calcium, rubidium, and cesium. Put aluminum iodine powder in the sanitary napkin, and then add a combustion accelerant, and the blood will contain water.
When a person has menstruation, the sanitary napkin will burn. If it is further upgraded and manufactured, the bomb hidden in the sanitary napkin can be detonated by burning.
The reports of Lao Goose and the boss of the dormitory were exactly the same. The police suspected that they plagiarized each other in order to win scholarships. According to the knowledge and theory in their reports, they could have made a moonlight bomb.
The disabled girl, named Xu Nian, was the only student who submitted two bomb-making techniques.
Xu Nian lost her legs in a car accident when she was young and relied on a wheelchair to get around. There are many disabled students in the university, but those in wheelchairs are rare. Many students know Xu Nian, and everyone’s impression of her is: simple, innocent,
Versatile, good at painting and music.
Xu Nian's dormitory director reported to the police that one time, the teacher took students from the school's painting club to sketch and draw horses on a hillside. That season was the horse's estrus, and a long and thick erection was erect on the horse's crotch.
All the girls who were painting crossed the stick of the horse and deliberately did not draw. Only Xu Nian painted the whole horse completely, and the stick was also painted vividly. When the teacher checked, other students criticized
Xu Nian said, you little girl is so sexy.
The special case team analyzed that Xu Nian is highly suspicious!
The female principal denied this view. She told the special case team: If there is anyone in this school who is not suspected of committing a crime, it must be Xu Nian. How could this innocent girl kill someone? Besides, the counselor
The place where Xu Nian lives is on the third floor. It is impossible for Xu Nian to go to the counselor's dormitory in a wheelchair, let alone do anything to the sanitary napkins that the counselor puts in the bedside table.
Bao Zhan asked: How do you know that the counselor puts sanitary napkins on the bedside table?