Chapter 37: The Viper Murder Case (16) No Ifs...

"Fingerprints? What are fingerprints?"

Zheng Wutong was stunned for a moment and asked this question.

Sure enough, just as Sang Luo thought, fingerprint identification technology was not yet popular in that era, and people's concepts had not been updated. Many people did not have the concept of "fingerprints", let alone wiping fingerprints.

In order to make Zheng Wutong give up completely, Sang Luo gave him some scientific knowledge: "Fingerprints are the lines on your ten fingers. Everyone's fingerprints are different. As long as your fingerprints are identified on the gun, it means you have touched the gun."

"Ah, this..." Zheng Wutong looked down at his ten fingers, "How is this possible? The lines on people's fingers are all crooked, how can you tell the difference?"

Zheng Wutong didn't believe this from the bottom of his heart. He raised his head and smiled at Sang Luo, his face regaining confidence: "Officer, I get it, you must be deceiving me, you want to induce me to confess, right? I tell you, I won't be fooled, I didn't do it, I will never admit it even if I die!"

Seeing that Zheng Wutong was so stubborn, Sang Luo was too lazy to explain anything further to him. Anyway, as long as the fingerprint identification results came out, the police would have solid evidence in their hands, enough to convict him.

While they were in silence, Sang Luo received a call from a colleague from Team 2:

"Hey, Sang Luo, Zheng Longmen just woke up and has regained his sanity. You asked me to find a doctor to examine his injuries, and I have already done so. The doctor shaved off all his hair and found a blunt force injury on the back of his head. It was caused a few days ago, and the wound has scabbed over automatically. Zheng Longmen has thick hair, so the injury cannot be seen at first glance, and even he himself does not know when it was caused."

"The back of the head..." Sang Luo looked up at Zheng Wutong thoughtfully, "It wasn't you who hit him, it was your wife Li Xiujuan. You were arguing with him face to face at the time. If it was you, you would have hit him on the forehead. So someone attacked Zheng Longmen from behind while you were arguing. This person could only be your wife Li Xiujuan."

"You two have taken care of Zheng Longmen for more than a year and have suffered a lot from his violence. You two are tired of him and hope he dies."

Although Sang Luo's analysis made sense, Zheng Wutong remained indifferent. He felt deep down that the police could not produce any evidence, and as long as he refused to admit it, the police would at most sentence him to the crime of harboring a criminal.

Time passed by minute by minute. Zheng Wutong wanted to delay, but Sang Luo was not in a hurry. She used this time to find the fat owner of the game shop and asked the fat owner to identify Zheng Wutong. The fat owner recognized that Zheng Wutong was a regular customer of his shop and had been there more than once. Zheng Wutong's face turned even worse, but he still refused to say anything.

At three o'clock in the afternoon, Yuan Xiaohu and Xie Ling'er finally came back with the fingerprint identification results. As expected, the fingerprints on the gun were Zheng Wutong's. Facing this result, Zheng Wutong was confused. Until now, he still didn't believe that he could be determined to be the murderer based on the lines on his fingers. He began to shout in the interrogation room: "Unjust! Unjust!"

Ma Shi Tu frowned and changed his face, sternly warning him: "Zheng Wutong, this is your last chance to confess. You have caused two deaths at once, and you will definitely be sentenced to death in the end. If you take the initiative to cooperate with the police investigation, there is still a glimmer of hope."

Zheng Wutong remained silent, and Ma Shi Tu stopped talking to him and directly asked the auxiliary police to take him away. Seeing that the auxiliary police were really going to pull him out of the interrogation room, Zheng Wutong began to panic. He looked back frequently and kept looking at Sang Luo and Ma Shi Tu, but neither of them paid any attention to him.

Fearing that the two would really close the case, Zheng Wutong finally gave in. At the last moment before being dragged out of the interrogation room, he shouted loudly: "Stop! Don't pull me, I'll tell you everything!"

The auxiliary police officer walked him back to his chair. Zheng Wutong lowered his head and began to talk about what happened that day:

"Actually, it wasn't because of the wedding invitation. I threw away the wedding invitation that Gu Yixiang gave me at work and didn't even take it home. On the night of the 30th, my wife and I got home from get off work and Zheng Longmen was studying in his bedroom. When I saw his dead look, I got angrier and angrier. Gu Yixiang's daughter is about to get married and have children, but he's still repeating a grade here. He's such a loser that he can't even get into a Beijing university. It's really embarrassing for me!"

"I really couldn't help it, so I said a few words to him, and then I ordered him not to sleep at night, to stay up all night to write a self-criticism for me. He didn't say anything, just groaned a few times. He always looked so angry, and I got angry just by looking at him!"

"Later, I returned to my bedroom, thinking about what happened at Gu Yixiang's house. I couldn't sleep. At about twelve o'clock, I sat up from the bed and wanted to see what Zheng Longmen was doing and whether he listened to me and wrote a self-criticism."

"I pushed open his bedroom door. I had set rules for him before. He was not allowed to lock the door when we were at home. This ensured that we could enter the bedroom and supervise him at any time. He always listened to us, except when he was sick."

"I pushed the door open and he immediately hid something under the book. Although he moved quickly, I still saw it. I snatched the thing from him. It was a piece of paper, the one I took the initiative to give you. It contained his murder plan."

"I understood it right away. This was a murder plan against me and my wife. He actually wanted to kill us," Zheng Wutong shrugged. He still didn't think he had done anything wrong. "We gave birth to him and raised him with great effort, and he actually wanted to kill us?! What a heartless person!"

"Don't forget, it was you who forced him to repeat a grade again and again, and it was you who ruined his life." Sang Luo couldn't help but remind him.

Zheng Wutong automatically blocked out Sang Luo's words. He talked to himself, "I was furious when I saw the paper, and I started arguing with him. He stopped pretending and changed his usual obedience. He yelled at me, saying that he hated me and that he would kill me one day."

"Hearing these words, I felt a chill down my spine. I knew this guy wasn't just bluffing, he meant it. He really wanted to kill me, and sooner or later he would put it into practice."

"Like you said before, I actually wanted to kill him too. For countless days and nights, I hoped that he would get sick or have a car accident. In short, as long as he died for a decent reason, my wife and I wouldn't have to support a useless person and worry about what he would look like when he got sick."

"For a year, we have been tolerating him and trying to keep his illness a secret. We have endured enough. As parents, we have done our best."

"I started swearing at him, and he was about to hit me, trying to grab my neck. I panicked. Officer, you know he's young and strong, and I'm old. If we really started fighting, how could I be his opponent? So I ran away. Just as I turned around, I heard a loud noise behind me. I turned around and saw my son slowly fall down."

"Xiujuan was holding an iron pot in her hand. She was the one who knocked my son down with the pot. She was helping me."

"We were both still in shock and dragged our son to the bed. I tried to wake him up but it didn't work. I didn't dare to send him to the hospital. I realized it was a serious matter. My son might have been hurt. If the police intervened, Xiujuan might be convicted of accidental homicide."

"I thought, since things have come to this, I might as well go all out and take this opportunity to really kill my son. I've had enough of him."

"Xiujuan was reluctant and kept wiping away tears. I didn't say much to her and planned to do it alone. My son happened to write this plan, which I thought was a good idea, especially the one about using a snake. If he died from a snake bite, people would think it was an accident and no one would suspect us."

"Later, what happened was just like what you said," Zheng Wutong looked up at Sang Luo, "I've been to many places since I got to this level, and I immediately thought of where there were snakes, but I couldn't just go there. After thinking for a while, I went to a brothel. It was in a large basement. Although it looked shabby, the prices inside were not low."

"After buying a gun and a balaclava at the brothel, I was afraid that my height would expose me, so I went to a small shop that was still open and bought ten pairs of insoles. I stuffed them all into my shoes, then I tried to put on my shoes, went to the game shop, followed the owner into the house, and got the snake."

"Finally, I carried the iron cage home. My son was still unconscious and Xiujuan was still crying. After she saw what I had in my hand, she cried even harder. But she didn't stop me and acquiesced to my actions. I took off my son's clothes and covered him with a blanket, pretending that he was sleeping."

"I looked at my son, then opened the door of the cage and let the snake in. I then carefully closed the door. Everything will be resolved as long as tonight passes."

"The next day, which was the morning of the 31st, I opened the door and took a look. My son looked normal and was obviously fine. I thought it was very strange, but I didn't dare to risk going into the house to check. I had to close the door again, hoping that my son would be dead when I got home from get off work in the evening."

"Xiujuan and I went home after get off work at 8pm. We were in class all day today, and we tried to stay with our colleagues when we didn't have classes. If anyone asks about it later, we have sufficient alibis."

"I opened the door to my son's bedroom and we were both terrified - he stood up like nothing had happened and smiled at us, as if he had no memory of what had happened before. I felt very guilty and pretended to be nothing and chatted with him. At this time, I heard crying and wailing outside."

"I went out and saw that it was Nie Yu next door crying at the door. According to the neighbors, his wife and children were dead, killed by a poisonous snake."

"My heart sank. I knew I was doomed. I didn't kill the person I wanted to kill, but I killed two completely innocent people. I was very scared and wondered how the snake got there. Later, I found the hole in my son's bedroom and bought cement to block it overnight. I just hoped that the police would not find out about us."

"Finally, I remembered the gun and the mask I had used. These two items were still under my bed. I spent the whole night burying them in the grave my son had mentioned. This way, if something happened in the future, I could still blame it on my son."

After finishing speaking, Zheng Wutong let out a long sigh and covered his face with his hands: "I didn't want this to happen. I wanted to kill my own son, but who would have thought that the mother and daughter next door would die? God is really playing tricks on me. Why didn't the one who should die die, but the one who shouldn't die did..."

When Sang Luo heard this, she suddenly felt that it sounded familiar. Yes, she remembered that when she and Xie Ling'er were visiting Chuncha Lane, they heard neighbors chatting. One of them said, "Why was it He Taohua who died?" This sentence made Sang Luo particularly alert. She thought at the time that the person who said this was the murderer. Now it seems that her intuition was correct.

The person who said this at that time was Zheng Wutong.

Finally, Zheng Wutong was still sighing to himself: "How could things have come to this? I have already thought about it so carefully. As long as the snake bites my son to death, our family will treat it as an accident and will not alert the police at all. But there happened to be a damn hole in the wall! And the snake happened to crawl through that damn hole, and Nie Yu happened to call the police again!"

"If it weren't for this hole, if I had been more careful when picking the snake and picked a northern venomous snake, I wouldn't have been discovered at all..."