Chinese New Year's Eve. In the courtyard of Hengling No. 74, a group of technical detectives surrounded Ai Chunguang and listened to him introduce the murder process explained by Liu Guanglan. After Chunguang finished speaking, Yu Jian said: "Ai Da, this scene is very simple: the key is to find two things, one is the 'rat poison bottle', and the other is the cup that Ning Yuanfu drinks water from. The suspect has confessed, and we just need to gather evidence to prove the poisoning and murder - and that's it! "You can't be careless. Before the victim's body was found, Liu Guanglan's confession could not be fully believed. The investigation site is still in accordance with the 'rules' step by step, and all special and suspicious points cannot be let go! Ai Chunguang solemnly advised: He didn't want the scene to be as simple as his junior said, but more than ten years of experience in investigating the scene told him that it is not difficult to be difficult first, and it is always right to consider comprehensively; The process of throwing the body explained by Widow Liu is unreasonable, and it is difficult to guarantee that she will not lie when she "confesses to killing"?

According to the survey plan conceived on the road, Ai Da quickly divided the technical group: Yu Jian, Tong Shijia, Bai Qingshan, and Zeng Jingxian were responsible for surveying Liu Guanglan's bedroom; He, Que Haotian, Yang Yongjun, and Yun Qian worked in a group to investigate the kitchen and living room. The reason why the center was sent to Inspector Yu was that he hoped that his younger students would make major discoveries and receive awards for meritorious service; The second is to increase the sharpening of Yu Jian's independent position to prepare for the handover of the technical deputy captain class. After the division of labor, everyone put on "three sets and one cover", picked up the equipment and went up to the second floor.

Zhuge Qiang stood aside and listened carefully to what Ai Da said, and did not dare to bring it up immediately - into the scene. When the technician finished, he asked Cheng Da for permission, so he learned to behave, put on shoe covers, gloves, head covers and masks, and walked to the outer stairs...

Ai Chunguang stood at the door of the kitchen, and his first feeling was: the kitchen was very clean, and the gas stove, pots and pans were neatly placed! Taking pictures and videos—without his orders, Inspector Que and Yang Yongjun unfolded in an orderly manner. The interrogation transcript does not mention where Liu Guanglan got the rat poison. According to ordinary people's habits, rat poison should be kept away from food and not easily touched in a hidden place. Where will it be..."After a round of spring light, I didn't find the "ideal"?

"Aida, I'm thinking—I don't know, do you? Widow Willow could think of the 'sunken corpse' layer, and she would definitely think of throwing away the rat poison bottle and the poisoned cup. Xiao Zhuge said softly. Que Yi just retreated to the door and said, "As long as you are not a 'fool', you can probably think of a tool to deal with the crime." Hurry up and ask the interrogator - save us a waste of time! "Qiang Host looks at Ai Da?" The first time the material was talked about was a little rough..."Ai Chunguang touched the door of his brain and said: "You go and report to Cheng Da and ask him to ask the interrogation team: Where do rat poison bottles usually go?" After Liu Guanglan used it to commit the crime, how did she deal with it? What are the characteristics of poisoning glasses? Where did you get it from? Where did it go? Also, how did the widow deal with the bedroom bedding after committing the crime? How was the site cleaned up? These details have to be figured out! If not, ask the interrogating brother to take the time to ask the question—the more detailed the better, as it will be helpful to investigate the scene and gather evidence. Zhuge Qiang nodded in agreement, and went downstairs to find Cheng Yong?

Ai Da instructed Inspector Que to lead Yang Yongjun and Yun Qian to carefully investigate the dynamics of the kitchen scene, and then came to the door of the living room. The living room is also very well organized and organized! He frowned and thought: "The cases that happened on the thirteenth night of the lunar month are all twenty-nine today. The widow had enough time to 'clean up' the crime scene and think about how to escape the blow... It seems that the chances of finding physical evidence directly related to the crime are extremely small...""Senior, the forensic doctor has made a major discovery! Yu Jian walked to Chunguang's side and excitedly reported-

Inspector Yu's team surveyed the bedroom, and the interior furnishings were not complicated: there were two beds, one large and one small, in the north-south direction of the wall, and from the bed, the single bed was obviously Yuan Shanshan's, and the double bed was slept by Liu Guanglan. Between the two beds, in the back window, is an old-fashioned burgundy desk with books, school supplies, etc. There are also two sets of simple wardrobes.

After Tong Shijia took pictures and Bai Qingshan finished recording, Yu Jian began to focus on inspecting the double bed, while Zeng Jingxian focused his attention on the desk. Soon, Zeng Forensic Doctor said quietly: "Detective, you are rich, there is a 'baby' here!" "Yu Jian came to him? Sega and Aoyama also came around to watch? Zeng Jingxian pointed to the lower edge of the façade of the desk next to the big bed and asked, "Good things—do you see them?" "Three people are looking closely?" Like 'blood'-" the boy called out first. "Where, where? Why didn't I see it?" asked Xiao Bai urgently. "Be foolish." At this moment, Inspector Yu had already seen that Zeng Jingxian had investigated the location of the light, and there were three dark brown spots: if he didn't look closely, he couldn't find it at all. "You're a forensic 'expert', what do you think?" Yu Jian asked Zeng Jingxian: "Is it blood?" "You call Ai Da to come and see-" Forensic Doctor Zeng did not answer directly, grinning incomprehensibly.

Ai Chunguang walked to the desk, bent down and examined it for 10 minutes before straightening up and asking, "Jingxian, according to my 'three-legged cat' forensic knowledge, I think it's blood." What about your opinion? Although he majored in trace examination, he also knew a little about forensic science, thanks to regular book study, and Wei Mingzhi and Zhao Decai, two forensic doctors, went to teach "hand-in-hand" on the spot. "You are the captain of the brigade and an expert of the provincial department, and you say 'yes' - who dares to say 'no'?" Zeng forensic doctor squeezed his eyebrows and said: Last year, Ai Chunguang was hired as a criminal technology expert in Xuanhu City, and he deliberately raised a level to "run" jokes. "Say 'serious'—" said the big man earnestly, "these three spots are like old splatters of blood." If it's Ning Yuanfu, it's going to be a big trouble?" He has a big head and a good memory, and he remembers it clearly—Widow Liu confessed: Ning Yuanfu was poisoned! How could there be a "blood splatter" at the scene of the poisoning?

Zeng Jingxian looked at the four professional colleagues who were staring at him with blank eyes, and said with a smile: "Judging from the color, it looks like 'blood', if so, the time of appearance and the time of the crime are relatively close." He thought in his heart that it was blood, and out of the usual rigor of the forensic doctor, he would never say "yes" without further examination. Ai Da heard the underlying meaning of Forensic Doctor Zeng's words—this little blood splattering had something to do with Ning Guangtou's murder. He felt that his head was suddenly bigger: in layman's terms, "blood splattering" is the blood splattered from the damage of the arteries and blood vessels of a living person, which is more common in the scene of injury such as stabbing with knives and spears, slashing with knives and axes. If the blood is Ning Yuanfu, it directly shows that Widow Liu is "lying"...

"Aida, will you come out?" Cheng Yong shouted at the bedroom door. "Don't move 'this' for now. Secrecy! Ai Chunguang pointed to the traces and whispered, turned around and walked to Cheng Da? Cheng Yong said the latest progress of the interrogation -

After Liu Guanglan brought "rat poison" from her hometown, she kept it on the top of the cupboard and covered it with plastic film. After poisoning Ning Yuanfu that night, she put the medicine bottle and the glass for pouring water in a white convenience bag, took it out overnight and threw it away, and the specific place where she threw it was not clear. The bedding that Ning Yuanfu slept on, she took to the garbage dump and burned it the next day. All floors in the room were sprinkled with '84' disinfectant – mopped three times. She wants to erase "all memories" about Ning Bald Head at home.

Cheng Yong, who has always been known for his tenacity and hard work, couldn't help but sigh, not only did he not have the brilliance of "successfully solving the case" on his haggard face, but there was a little more melancholy: there is only a confession, there is no hard evidence at the scene, and it is too difficult to convict the suspect! "The conditions of the center site are poor, and we still have a 'corpse' site." Chunguang muttered comforting to the captain. He suddenly felt his left eyelid tug violently twice.