CHAPTER IX

Mosquito coils burn corpses

How can a schoolboy burn down the school dormitory he hates at home?

How can a laid-off worker set fire to the goods in the factory warehouse in the field?

Arson and homicide are serious crimes that are often compared to each other. Some criminals who think they are clever will use remote ignition or delayed ignition, and although the fire will destroy some of the evidence of the crime, they will often be self-defeating if they underestimate the detection ability of the police.

Zhang Qingjin hangs from a hook on the roof of the bedroom, which is reserved for the ceiling fan.

Zhang Qingjin's hanging body was a bed beneath him, his lower body was charred into black charcoal, his coat was roasted into a ball, attached to his body like a tree, and his facial skin exploded, charred on the outside and tender on the inside, like roast mutton in a restaurant.

Many suicide people, worried that they will not die, often choose multiple suicide methods at the same time.

For example, drink pesticides before hanging, take a lot of sleeping pills and then jump off a building.

The police found the tool of the crime - a cutting machine in the storage room of Zhang Qingjin's rental house. This directly points to him as the murderer. Zhang Qingjin killed Lin June and her son Xiao Tieyu, committed suicide in fear of crime, first set fire to it and then hanged himself, on the surface, this person is resolute in his death, the truth of this case is revealed, and it should end here.

However, this fire has raised a lot of doubts.

The fire scene is very different, and the most important thing in the investigation process is the investigation of the fire scene, because the form of the fire is different, and the physical and chemical properties of the original items that form the traces and physical evidence are different, so the causes of the fire are also diverse. The first step is to determine the point of fire in conjunction with the site investigation, and any residual objects at the center of the fire are critical. Furniture with small support surfaces such as round tables and coffee tables will fall in the opposite direction to ordinary furniture due to the weightlessness of the first burned side due to the action of flames. The ashes of the wooden furniture are piled vertically in the same position, which does not indicate the direction of the spread of the fire, but it can prove the degree of development of the fire and the distance from the fire point, so that the location of the fire can be determined according to the traces of spread.

Bao Chop found a pile of incendiary materials next to the bed, and combined with the scene, it was confirmed that this was the point of fire. By separating the combustible material into a section, carefully observing the combustion of each layer of the residue, and identifying the type of substance in each layer, the cause of the fire can be clarified.

The burning material contains residual mosquito coils, burned and bent mosquito coil holders, match stems, and newspaper ashes, and it is possible to analyze how the fire occurred.

The killer lit a plate of mosquito coils and placed them on the stand, put a few more matches on the mosquito coils, and then placed a ball of newspaper on it. The mosquito coil ignited the match, the match burned the newspaper, and the bed sheet next to it also caught fire, and the fire broke out.

Mosquito coils can be burned for several hours and can create conditions for the murderer to prove an alibi.

At the time of the fire, the murderer was far away from the scene, deliberately misleading the police into believing that the murderer did not have time to commit the crime.

After the visit, Zhang Qingjin bought mosquito coils and matches from a nearby commissary, and the forensic doctor's autopsy report did not find smoke and dust on the deceased Zhang Qingjin's trachea and lungs, indicating that he was already dead when the fire broke out.

The murderer has the characteristics of a high-IQ crime, and after the killing, he fakes a suicide scene on the spot in a short period of time.

Although there are many clues, the case is still at an impasse, and the police are at a loss.

The special case group held an emergency meeting, at which everyone affirmed the direction of the investigation, and the two cases were committed by acquaintances. At the time of the crime, Lin June was with her children, and she also wore makeup and lipstick, and she was going to meet a very close person.

One leader said: "What is the case?

No progress? Now I don't know how many murderers were, whether they were men or women. ”

Su Mei said: "I tend to commit crimes by multiple women, but now that there is one more suspect, there is still progress in the case." ”

The leader asked, "Which one?" ”

Su Mei said: "Zhang Qingjin's wife, a good family was broken because of an extramarital affair, Zhang Qingjin's wife may have a grudge against Lin June and retaliate. ”

Bao said: "I think the murderer is a man, and one person committed the crime. ”

"I agree with Baozi's opinion, several of the victims have no obvious fight scars, and the murderer should be a physically strong adult male with high intelligence and excellent physical fitness," said Hualong. ”

Erbao stood up and said, "I want to review, I have hidden an important matter. ”

The leader asked, "What is it, you sit down and say." ”

Erbao still stood and said: "That day, Aunt Qi insulted me, and I washed off the lipstick marks on my face when I went home, and I suddenly remembered that Lin June and Xiao Tieyu had lipstick marks on their corpses, could this have any connection?" ”

Hualong said: "If you say this, Aunt Qi's suspicion cannot be completely ruled out, you go and let her be indecent again, let's compare the lipstick ingredients." ”

Erbao's face was embarrassed, and he said hesitantly: "I...... All right! ”

The leader said, "No kidding, what should we do now?" ”

Professor Leung said, "I have a good idea! ”

The leader said, "What way?" ”

Professor Liang said: "There must be some omissions in our early work, so that we did not find important clues, and if we want to seek a breakthrough and lock down the real culprit, we will do those boring and tedious work again in the most stupid way!" ”

Professor Leung's reassignment of tasks requires everyone to take their own responsibilities and be thorough and thorough.

Erbao visited Aunt Qi again to thoroughly find out whether this person was suspected of committing a crime.

Su Mei focused on Zhang Qingjin's wife and immediate family members.

Draw the dragon to understand the social relationship of Zhuang Qin's lover Xiao Ming from the side, and whether there are other men besides Zhuang Qin.

Bao beheaded the provincial capital and made a comprehensive record of Zhuang Qin's whereabouts at the time of the crime, including close contacts, and made a list of those who had been in contact, and the possibility of buying a murder could not be ruled out at present.

Zhang Qingjin's wife is also a teacher, and the couple teach at the same middle school.

After the divorce, she returned home alone, closed the door alone, the house was in a mess, the drawers were opened, the cabinets were open, the food in the kitchen gave off a bad smell, she sat on the ground against the wall, sitting in the dark, and her heart was sad.

Su Mei and two policemen knocked on the door, and the policemen wanted to take Zhang Qingjin's wife back to the police station, but Su Mei stopped him.

Su Mei saw a pair of crutches placed on the wall, Zhang Qingjin's wife is a disabled person, and she is paralyzed in the right lower limb due to illness, which directly excludes her suspicion of committing the crime.

The police implicitly explained their intentions, saying that Zhang Qingjin had an accident and that a fire broke out in his residence.

Zhang Qingjin's wife stood up tremblingly and asked, "Which hospital is he in?" I went to see him. ”

Su Mei said, "I'm sorry...... Your husband has died. ”

Zhang Qingjin's wife was in a trance and fainted to the ground.

Devouring Two families are torn apart, three people are killed, but the real culprit is still at large, hiding behind the fog.

Professor Liang thought that Zhuang Qin was the most suspicious, so he sent his right-hand man to behead him. Bao Chu felt a lot of pressure, and after arriving in the provincial capital, he didn't close his eyes for two days and two nights, and visited one after another

Everyone Zhuang Qin came into contact with investigated every place Zhuang Qin had visited, and obtained a group photo of Zhuang Qin at the distribution meeting and the surveillance footage of the hotel. After repeated comparative analysis, he made an astonishing discovery. On the returning train, Bao Chu fell asleep, and at the same time, Hualong led people to arrest Zhuang Qin.

This interrogation was different from previous police summonses, Professor Liang was proficient in criminal psychology and knew that the suspect's psychological quality was very good, so a special interrogation room was set up.

The interrogation room is soundproofed from the outside world, and there is a see-through mirror on the wall. Most of the suspects are already very nervous when they are handcuffed, and the mirror deepens their uneasy emotions, the suspect does not know who is behind the mirror, and is worried that there may be a victim or eyewitness standing behind the mirror, driven by this thought, the police will have a great deterrent effect on the suspect's psychology.

The interrogation room was closed and devoid of sunlight, and the suspect and the police were separated by a cold iron bar, which made the police appear more dignified. The lights shone on the suspect's face, and no expression could escape the eyes of the police, which added to the atmosphere of fear and cringe. No one wants to stay in this kind of place for too long.

The interrogation officially began, and Professor Liang also put on a police uniform and stared at Zhuang Qin intently.

Zhuang Qin said uneasily: "I want to find a lawyer, why should I be arrested?" ”

Professor Leung said: "Of course, it is your right to find a lawyer to defend you in court. ”

Hualong slapped the table suddenly, pointed at Zhuang Qin and shouted: "Knowingly ask, arrest you, you know why I arrested you here." ”

Zhuang Qin said: "I don't know, don't set me up." ”

Professor Liang said, "Zhang Qingjin, do you know each other? It's the man who had an extramarital affair with your wife, and he's dead. ”

Zhuang Qin said: "What does this have to do with me? ”

Professor Liang said: "Of course it has something to do with you, you know he is dead, don't you?" ”

Zhuang Qin said: "I heard that he was burned to death. ”

Professor Leung said, "Where were you when the fire broke out? ”

Zhuang Qin said: "I don't know when the fire started, I have been at home with a few relatives to take care of my wife's funeral." ”

The dragon said: "You pushed it very cleanly, I think, you won't tell the truth if you don't beat you." ”

Zhuang Qin said: "You still engage in torture to extract confessions? ”

Professor Liang said: "We will be very polite to you, don't worry, you are attending a distribution fair in the provincial capital, your wife was killed, on the surface, you have no time to commit the crime, but we have found a few small questions, please answer truthfully." ”

Zhuang Qin said, "Can you let my lawyer answer?" ”

Professor Liang looked at Zhuang Qin, was silent for a while, and said, "If you don't answer, you are weak-hearted, what do you want to hide?" ”

Zhuang Qin said: "Okay, then you ask." ”

Professor Liang said: "You usually smoke 20 yuan a pack of Yuxi cigarettes, why do you smoke 5 yuan a pack of Honghe in the provincial capital? ”

Zhuang Qin replied: "Can't I save money?" What's the problem?! ”

Professor Liang said: "You rarely eat garlic, and you can't eat spicy because you have a stomach ulcer, but in a restaurant in the provincial capital, you order a plate of spicy chicken and a garlic eggplant, why is that?" ”

Zhuang Qin was a little annoyed and angry, and said, "What I eat is my freedom, and you have too much control." ”

The dragon said: "Then pretend, you are really good at pretending." ”

Zhuang Qin twisted his head to the side and said, "If you don't have any evidence, you can detain me for up to 48 hours." ”

Professor Leung said, "Do you know who is behind the mirror? ”