Many police officers have already evacuated from the scene. Bai Song can reasonably be allowed to rest this morning, so the unit has nothing to do with him. He stayed at the scene. The leaders of several criminal investigation teams saw him and greeted him one after another.

　　 "Brother Sun, is the forensic doctor of the City Criminal Investigation Bureau better than you?" Bai Song asked curiously.

　　 "How do you say, do you think the forensic doctor is a doctor or a policeman?" Sun Jie asked back.

　　 "You graduated from a medical university, of course you are a doctor," Bai Song said: "Although you are also police officers, besides the Public Security Bureau, forensic doctors can also work in procuratorates, courts and other departments. You are a doctor."

　　 "Yes, it's a doctor." Sun Jie nodded, "The profession of a doctor is pronounced ‘doctor’ in English, and this word, besides doctor, also means ‘doctor’, you know that."

Seeing Bai Song nodded, Sun Jie continued: "Why the higher the level of doctors in the larger hospitals? In fact, forensic doctors are also the same. The larger the forensic doctors in places, the more weird and strange cases will be seen. The more, the higher the level naturally."

"Really, it's no different from a doctor." Bai Song was standing outside the corridor. From his perspective, he could see Sun's corpse. Although the corpse was still observed at such a close distance, Bai Song still felt a lot of pressure, but compared to two months. In the past, Bai Song has improved a lot, so it's no problem to stare at it carefully.

　　 "This person's face is a little black", Bai Song said: "Could it be suffocated?"

"Yes!" Sun Jie said in amazement: "You can see this, not bad. What you said, indeed, we are also considering this issue, the deceased Sun Mou had blood stasis on the face, accompanied by petechiae. Bleeding and cyanosis are indeed the possibility of death from mechanical suffocation. However, in modern forensic theory, these symptoms do not mean that this is suffocation, because there are many diseases and other methods of death. "

　　 "Disease? If it is a disease, it is unlikely." Bai Song said, the isolation belt outside was opened, and three or four policemen came up from downstairs.

The Daguangli community is an old community, with three households on one ladder and six floors to the top. Sun’s residence is on the sixth floor. Sun is a rented house with a monthly rent of only 600 yuan. The landlord was shocked when he heard the news. At present, he was also taken away by the police on duty in the post.

　　 The two neighbors of Sun’s residence, the middle household is now empty. The opposite is called to the police. Only a middle-aged woman is at home and has been taken away to take notes.

There were four policemen who came up. Two of them were criminal police officers from the branch. One of them was a deputy captain. Bai Song had seen him in the detachment, but he could not be named. The other was Duan Fei. The remaining two must be from the city. The forensic doctor.

The forensic doctor headed by 　　 is almost 40 years old. He wears a pair of very light glasses. Although he wears a police uniform, he is spotless and very tidy. In addition, the four forensic doctors including Sun Jie began to wear shoe covers, headgear, gloves and other necessary equipment at the same time, and entered the scene together, leaving Bai Song and the deputy captain of the criminal investigation outside to watch.

　　 Bai Song didn't know what to say, so it would be better not to say it. He was still a little uncomfortable looking at the corpse, so he sat down directly on the corner between the fifth and sixth floors.

　　 The corridors of the old community have no heating at all, and there are cracks in the windows at the corners of the corridors. It is during the "heavy snow" period of the twenty-four solar terms, and the corridors are still very cold at this time. If you sit directly on the ground, your buttocks will freeze in a short while, and Bai Song can only squat in the corridor to rest for a while. It is indeed a bit tired to always stand.

　　 Crouching in the corridor, Bai Song looked up. From this point of view, he could only see the walls and stairs on the roof.

In the old-fashioned building, there is a skylight between the sixth floor and the top floor, but not every unit has it. There are a total of 5 units in this building. Unit 5, so there is no possibility that someone can get to the top of the building from here.

　　 Bai Song looked at the dilapidated roof. This community is really old for some years. The walls of the corridor are very dirty. Even the roof of the sixth floor is dark. I don't know what it is.

　　 Several forensic doctors may still need some time, Bai Song is not idle, he went downstairs.

　　 I don't know if it is intuition or pure obsessive-compulsive disorder, Bai Song wants to go upstairs to have a look. Since this unit did not have a passage to the top of the building, the office did not arrange the above inspections. After going downstairs from the third unit and leaving the cordon, Bai Song went directly to the second unit. The second unit was very quiet and there was no one in the corridor. After Bai Song reached the sixth floor, he saw the road leading to the rooftop.

　　 This is a passage similar to the head of a well. The way to go up is to step on a steel ladder inlaid on the wall, climb to the top and open the cover on it to reach the rooftop.

　　 Bai Song also studied on-site surveys when he was in school, and he had a little bit of practice in several times~lightnovelpub.net~ He was so simple to see that this steel ladder has recently been climbed up. But there is basically no way to extract such traces. Bai Song took a closer look and started climbing directly. People who have been to the old building should have the impression that the first steel ladder of this kind is generally 1.5 meters above the ground. It is difficult for ordinary people to climb up without the help of stools or ladders. But for Bai Song not a problem.

　　 During the process of opening the roof of the building, Bai Song was very careful. The lid was a wooden shelf covered with iron, and the weight was not very heavy. Bai Song lifted it up easily.

　　 Secretly looked around with his eyes, Bai Song saw two people, Ma Detachment and Hao Zhenyu.

　　 Seeing that a colleague had come up, Bai Song directly opened the lid and crawled out.

　　 "Ma Detachment, Master Hao, you two are also here." Bai Song stepped up to say hello.

　　 Ma Detachment smiled slightly: "Do you think there is a problem here too?"

　　 "Huh? No, I just think I should take a look here." Bai Song said truthfully.

　　 "Well, it's a bit meticulous of the old scout." Master Hao nodded, "Come and see here."

　　 Bai Song immediately followed Master Hao's fingers and looked forward.

　　 "Bai Song, I heard that you almost fell off a tall building some time ago?" Hao Zhenyu pointed to the guardrail here.

　　The roof guardrail of the old house is different from the high-rise building. The guardrail here is only 15-20cm high. It is not used to prevent people from falling, but only to collect rainwater and discharge it from the drain.

Following Hao Zhenyu’s line of sight, Bai Song could clearly see that in the third unit, the upper roof of the deceased Sun Mou’s house had three or four very obvious rope scars. Master Hao used tools to extract several very fine pieces of rope. fiber.

　　 "This scene has been professionally handled." Ma Detachment looked around and thought.