Chapter 36: The Viper Murder Case (15) Uncovering the truth...
After hearing what Sang Luo said, Ma Shi Tu was thoughtful: "Zheng Longmen was knocked unconscious? If so, then the person who delivered the poisonous snake to the next door on the 31st was not him. He was just a scapegoat. He was arguing with his father at the time. If nothing unexpected happened, the person who knocked him unconscious was his father Zheng Wutong!"
Sang Luo nodded slowly: "I think so too, Master, I want to interrogate Zheng Wutong next, and I want to say something to him face to face."
Zheng Wutong was brought into the interrogation room. After sitting on the chair, he looked innocent: "Hey, two officers, hasn't the case been solved? Why are you still interrogating me? Did you find the things my son buried at the grave yesterday?"
"Found it." Sang Luo glanced at him, and Zheng Wutong showed a relieved expression on his face: "That's good, the thing has been found, why don't you let me go, are you going to hold me accountable for harboring someone?"
He looked at Ma Shi Tu and said, "Officer, you promised me yesterday that you could make amends for your crime by doing meritorious service. If I tell you the clues I know, you will help me get rid of the crime of harboring a criminal. Are you lying to me?"
Ma Shi Tu looked at him with a complicated expression: "You can make amends for your crime of harboring a criminal, but who can help you get rid of your crime of murder?"
Zheng Wutong panicked instantly: "Me? Murder? Who did I kill? Explain it to me clearly!"
Ma Shi Tu slammed the table in a serious tone: "You are suspected of killing He Taohua and Nie Yaoyao next door!"
Zheng Wutong smiled sarcastically, "Officer, I really don't understand what you are thinking. It was obviously my son who killed the people, and the case has been solved. Why would I kill them instead of arresting my son? I have said it before, what motive do I have to kill them? A housewife and a baby, I have no grudge against them at all, why would I kill them?"
"What if they weren't your original target?" Sang Luo stared into Zheng Wutong's eyes. "The person you wanted to kill was your son Zheng Longmen, but something went wrong. The snake slid into the house next door and killed the mother and daughter."
Zheng Wutong's expression froze, but he still forced a smile: "Ha, you are simply talking nonsense, why would I kill my own son? He is my own son!"
"He used to be your son with excellent grades, but what happened after he became ill?" Sang Luo pressed, "For someone like you who values face more than life, would you really tolerate having a son with a mental illness?"
"You have kept him at home for a whole year, but I think you know in your heart that this is not a long-term solution. Sooner or later, the news will leak out, and then your colleagues will laugh at you behind your back. You will become a joke in the whole school. You are a teacher who has trained countless top students, but your son is a lunatic."
"If you want to avoid this from happening, the best way is to get rid of this son. His illness is difficult to cure anyway, and he is a useless person in this world. If he dies unexpectedly, you don't have to worry about losing face. After the news spreads, everyone will come to comfort you. You two have a lot of pensions, and you can still spend a stable old age without him."
Zheng Wutong grinned and said, "Officer, these are just your one-sided guesses. Our family has a very good relationship. It's not as dark as you think. I think you have a very rich imagination."
Sang Luo held up his chin with his hand: "At first I was also confused and couldn't find anyone to suspect. It was your words that made me understand everything——"
"When I first interrogated you, I asked you what you thought about dealing with Ainong. At that time, you said that he was a lunatic and that all lunatics in the world should die."
"That's very strange. As the father of a mentally ill patient, you hope that all the crazy people in the world will die. And you looked so angry at that time. I thought you hated Fu Ainong. Now I think you hated someone else. It was Fu Ainong who reminded you of your son, so you were so excited."
Zheng Wutong rolled his eyes. "Did I say that? To be honest, officer, I have no recollection of it. Even if I did, I was too excited at the time and didn't know what to say. After all, Fu Ainong was such a sloppy person. I was scolding him, not my son."
He emphasized again: "Officer, although the child is sick, our family has a good relationship. It's not as bad as you think!"
"Really? Then how do you explain this?" Sang Luo picked up an evidence bag. Inside was a piece of paper, which was the murder plan written by Zheng Longmen himself.
Zheng Wutong looked puzzled: "What's wrong? Isn't this what I provided to you?"
"Yes, it was you who gave it to us, but you did some tricks on it--" Sang Luo spread out the paper and placed it carefully on the table.
[When I have the chance, I will definitely kill her. I have already thought of several ways——]
[1. Light coal in the house, then deliberately extinguish the fire to produce carbon monoxide, wait for the carbon monoxide to slowly drift over, and let them die in their sleep. I just need to hide away that night.]
[Second, find a poisonous snake and put it in her bedroom. When the snake bites her to death, others will think it was an accident and will not blame me.]
…
"I asked a colleague from the technical department to do a handwriting identification. This plan was indeed written by Zheng Longmen himself, but..." Sang Luo said loudly, "Every male 'he' in it was changed to a female 'she', but the person who changed it was very careful, so it's not easy to tell."
If the changes are removed, the original beginning of the plan becomes:
[When I have the chance, I will definitely kill him. I have already thought of several ways——]
When Zheng Longmen wrote this plan, the person he wanted to kill in his heart was a man, not He Taohua and her daughter.
Sang Luo: "Zheng Longmen is trapped at home every day. He almost only interacts with you two. So I think the only person he wants to kill is you, Zheng Wutong."
The person Zheng Longmen wanted to kill was not someone else, but his own father.
Zheng Wutong's expression changed again and again, and finally he said angrily: "This little bastard, I didn't even know he had such an idea!"
Sang Luo questioned, "Don't you really know? You destroyed your son's life with your own hands, turning him from a favored child into a mental patient. He is also a flesh-and-blood person, not a puppet in your hands. How could he not hate you when he fell to this point?"
"Nie Yu once said that he heard a quarrel next door on the night of the 30th, and Zheng Longmen shouted that he wanted to kill someone. What he meant must be that he wanted to kill you. Your family conflicts have long reached an irreconcilable point. Zheng Wutong, stop acting in front of the police."
Zheng Wutong remained silent, and Sang Luo continued his analysis: "The reason why we don't believe Zheng Longmen is the murderer is because there are too many suspicious points about him. Where did the gun and the mask come from? How did he know that the game restaurant was in a residential building? But if the murderer is replaced by you, then everything is explained."
"The police have not found the source of the gun, and that gun doesn't look like something you would find in a normal toy store. After thinking about it, I came up with a possibility -"
"The gun and the balaclava are not toys for children, but toys for adults, and both items were taken from an adult venue."
"The police have been unable to find the source of the gun, probably because this is a shady place, an illegal prostitution place. It may be hidden in a residential building like a game store, or in a more secret place."
It is not surprising to see masks and fake guns in brothels. Some people like to wear masks to dress up as animals, and some people like to use guns as props. Adults have all kinds of strange behaviors. Sang Luo did not explain it in detail, but Ma Shi Tu understood it instantly. After all, he has seen a lot of the world at his age.
"Prostitution sites usually have thugs and strict guards, so these two props were most likely not stolen, but bought by the murderer. This is another suspicious point. Zheng Longmen has no money on him, so how could he buy a gun and a hood?"
Zheng Wutong didn't say anything, but bit his lips tightly, his face darkening little by little.
Sang Luo: "We re-examined the murderer's movements that night. He first went out late at night, arrived at a prostitution site, paid for a gun and a hood, then put on the hood, followed the owner of the game shop, entered the game shop, and stole a venomous snake."
Sang Luo concluded: "This raises a question. How did the murderer know the location of the prostitution venue and the game store? There is only one possibility. He has been there."
"The realistic look of this gun shows that prostitution venues are expensive. Game shops are also expensive places. People who can spend money in these two places must be financially well-off and have a certain social status."
"Fu Ainong is extremely poor, Nie Yu is also financially strapped, and Zheng Longmen is penniless. None of the three of them can afford to spend money in places like this. You are the only one who can spend money in places like this on a daily basis."
"Gu Yixiang said that you are a heavy drinker and often accompany the principal to social events and block the drinking for the principal. I guess you entered these places when you were accompanying the principal to social events, right?"
Ma Shi Tu stared at Zheng Wutong's face. Zheng Wutong remained silent, his hands clenched into fists nervously.
"Now let me reconstruct what happened on the night of the 30th," Sang Luo said seriously, "That night you had an argument with Zheng Longmen, and he threatened to kill you. Of course, you also wanted to kill him, so you decided to strike first. You knocked him unconscious, asked your wife to watch over him, and then you went out alone."
"You have read the murder plan written by Zheng Longmen, and you intend to directly copy his plan and kill people with poisonous snakes. You have been to a game store, and you immediately thought of the poisonous snakes there."
"You first went to an adult venue to buy a gun and a hood, then went to a game store to steal a snake, and finally returned to your home in Chuncha Lane. Zheng Longmen was still unconscious, so you put him in his bedroom, threw the venomous snake in, and closed the door tightly, only to find him dead the next day."
"But you didn't expect that there was a small hole behind Zheng Longmen's desk for peeping, which was just the right hole for a venomous snake to pass through. The spotted snake likes a humid and hot environment. He Taohua's house is warmer than Zheng Longmen's bedroom, so the snake instinctively went into He Taohua's house."
"On the 31st, you went to work as usual. When you came back from get off work, you found that your son was still alive, but the mother and daughter next door were dead. You knew that things were messed up. In order to protect yourself, you had to make the best of it and put all the blame on your son. Anyway, Zheng Longmen was in a coma at the time and he didn't know what he had done. Everything is up to you."
"The statements you gave to the police during the last interrogation were all wrong. You said Zheng Longmen slammed the door and left, came back with a Coke bottle, and released the poisonous snake. You made all of this up in order to mislead the police and make them think Zheng Longmen was the murderer. In fact, you were the one who did all these things."
Zheng Wutong began to defend himself: "Why would I want the police to arrest my son? Officer, don't forget that I wanted to protect my son. I am guilty of harboring a criminal! If I wanted the police to take my son away, why would I fill the hole with cement overnight and fabricate an alibi for him?"
Sang Luo retorted, "You used cement to fill the hole, aren't you trying to reduce your suspicion? Without the hole, the police probably wouldn't have suspected you. And the alibi you made up is a joke. If I just go to the school and investigate, I'll know that Zheng Longmen didn't go to school at all. Aren't you increasing Zheng Longmen's suspicion by using such an alibi?"
When Sang Luo and Xie Ling'er visited the school together, they had doubted how the parents, who were considered to be highly intelligent, could come up with such a flimsy alibi. Now Sang Luo had the answer. The parents had never wanted to help their son escape the crime from the beginning. They wished that Zheng Longmen would be sent to jail.
"But..." Ma Shi Tu was a little skeptical. "The fat boss of the game shop said that the man who robbed that night was about 1.8 meters tall. Zheng Wutong is only 1.74 meters tall. How could there be such a big error?"
Zheng Wutong immediately said, "Yes, officer, please be fair. She just analyzed a lot of evidence, but there is no useful evidence. It's all her imagination. I think this woman is deliberately making things difficult for me. She wants to wrongly accuse me!"
"Okay, then let's use the evidence," Sang Luo raised his finger. "First, regarding the height issue, you have a pretty high IQ. You were afraid that the police would find out it was you, so you deliberately padded your height. On the night of the 30th, you must have put a lot of stuffing in your shoes to make yourself 1.80 meters tall."
"But it would be like wearing high heels, which makes it easy to walk unsteadily, so the owner of the game shop said that the murderer sprained his ankle when he left, and it seems that his legs and feet are not in good condition."
"Shoes with padding will expand. If you haven't changed your shoes since the incident, please take them off and let the inspection department check if there are any signs of expansion."
Zheng Wutong's eyes darted around and he began to stutter, "My shoes are stretched, so what? I lent them to someone before, and that person stretched them."
"Who to lend it to?" Sang Luo asked.
Zheng Wutong stopped talking.
"Secondly," Sang Luo held up two fingers, "You said Zheng Longmen went out for a while on the night of the 30th and came back. During that time, he completed a series of tasks such as buying guns, snatching snakes, and burying guns. We went to the grave last night and saw that it took most of the day just to dig up the grave. How could Zheng Longmen complete all these tasks in such a short time? This is enough to prove that you are lying!"
"Third," Sang Luo slowly raised his third finger, "Did you know that fingerprints can be detected on guns?"
Zheng Wutong was completely stunned. He blinked, and the light in his eyes completely went out.
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