In less than twenty-four hours, the murderer committed the murder again.

This also made the theoretical five-year-old suspect He Mingxuan completely clear of suspicion.

The deceased was a young man, and judging from his clothing, he looked like a spiritual guy.

The crime scene was on a meadow by the river, and although it was on the back street of the Market Building, few people usually set foot in it.

At the scene, the technical team found the footprints of a suspected murderer, which were left by a pair of size 37 flats.

Ren Qiushi, head of the forensic medical department, and Zeng Lan, a forensic doctor, have already arrived at the scene of the crime and are conducting an autopsy.

Ren Qiushi walked up to the deceased, gently unbuttoned his shirt that had been stained red with blood, and a shocking blood hole appeared in front of all of us.

As at the scene of the crime at the commissary last night, the deceased had a bloody hole the thickness of a little finger in his chest, as if he had been poked out with his fingers.

"Serial murders?!" Li Meng, who was beside him, suddenly muttered when he saw this familiar wound.

Judging from the current situation, the interval between the two cases is less than 24 hours, especially the wounds of the deceased in the two cases, which are indeed like serial homicides.

But this is not writing a novel after all, the situation in reality is still very complicated, and it is full of various possibilities, and the most important thing that cannot be ignored is imitation killing.

There are generally two types of imitation homicide cases, the first is because the murderer worships the murderer in a certain case, which is an act of imitating the murderous methods of his predecessors. The second is an ongoing homicide where the killer imitates the murder modus operandi and carries out hitchhiking killings, so that the police count all the cases as the real murderer.

As far as this case is concerned, whether it can be characterized as a serial homicide case and a joint investigation is still needed. In particular, on the basis of the autopsy and whether it is possible to establish the consistency of the murder weapon and the modus operandi.

Ren Qiushi and Zeng Lan can't give us a clear answer, because the murder weapon used by the murderer is a nail gun, and the nail will remain in the heart of the deceased. The situation at the scene did not allow for the completion of an autopsy, so the wound could only be briefly examined and then brought back to the dissection room for autopsy.

Ren Qiushi carefully observed the wound on the deceased's chest, blood kept coming out of the wound, he sighed the temperature of the corpse under the deceased's armpit with his hand, and found that although the corpse had formed a corpse stiffness, the temperature was not cold.

"The time of death was within six hours." Ren Qiushi said lightly.

This time makes me a little curious, because judging from my understanding of Ren Qiushi, when he speculates on the time of death of the deceased, he will use a more accurate time range, and the range range will not be more than two hours, but this time he actually set the range of death time within six hours.

Cadaver temperature, in forensic science, refers to the body temperature of a person after death. That is, after death, the life function completely stops, no heat energy is generated, and the corpse gradually becomes colder. The exposed parts of the corpse drop to the same temperature as the surrounding area after 6-10 hours.

"The average adult corpse, in the room temperature, drops by about 0.5°C per hour on average. The whole corpse was completely cold to the same temperature as the surrounding air, about a day and night. The speed of corpse coldness is closely related to age, fatness, thickness of clothing, environment, season, etc. For example, the temperature of the body of a healthy, obese, adult person, a thinner, older person, or a child decreases slowly. In the case of death from tetanus or sepsis, the temperature of the corpse may rise in the short term.

Determination of cadaver temperature is accurate to determine rectal temperature. The determination of corpse temperature is of some significance for estimating the time of death, but the influence of various factors inside and outside the corpse on corpse temperature must be considered.

The crime scene was on the meadow by the river, and it was autumn, and the temperature difference between day and night was very large, even during the day, and the temperature difference between morning and noon was particularly large. Therefore, it is difficult to determine the specific time of death from the temperature of the corpse alone. Ren Qiushi said slowly.

"Why don't you take the temperature of your rectum?" I said with some schadenfreude.

Measuring the temperature of a corpse through the rectum is a routine procedure for forensic doctors, but I have never seen Ren Qiushi do this with my own eyes.

Ren Qiushi looked at me in a daze, and said coldly: "Why don't you measure it?" ”

I also looked at him in a daze, and said with a hippie smile: "I am ...... to men No, I'm not interested in human chrysanthemums. ”

"I'm not interested either." Ren Qiushi didn't look at me again, and said lightly.

This made me a little embarrassed, and sure enough, Ren Qiushi was not the same person when he was working and when he was resting.

I shrugged my shoulders and went to talk to the technical team.

But I had just walked a few steps when Ren Qiushi's voice suddenly came from behind me: "No......"

After hearing his voice, I subconsciously stopped, hurried back to his side, and immediately asked, "What's wrong?" ”

Ren Qiushi frowned suddenly, and said seriously: "The deceased died on his back, and the wound was on the chest, but a large pool of blood was formed under the deceased's body. ”

I was stunned when I heard it, this is definitely a major suspicion, when the location of the deceased at the scene of the crime is inconsistent with the location of the bloodstains, it means that the scene has been destroyed.

The possibility then arises is that the deceased did not die immediately and moved a short distance on his own. Or maybe the killer destroyed the scene after the killing, or maybe this was not the scene of the first crime, but the scene of the dumping of the body.

This is a very critical issue and must be investigated as soon as possible.

Ren Qiushi froze and said seriously: "Turn the corpse over." ”

After hearing the voice, several detectives stepped forward together and flipped the corpse, which had formed a zombie, into a face-down position.

The deceased was wearing a white shirt inside, and on the outside was a Korean version of a slim-fitting suit.

The entire back of the deceased's clothes was stained red with blood.

And at the back of the deceased's waist, there was a visible tear in the clothes.

"And a second wound?!" Ren Qiushi muttered.

Zeng Lan, who was beside him, comprehended, took out a pair of scissors from the forensic investigation box, and cut it along the torn part of the deceased's coat.

Sure enough, there was an identical blood hole at the back of the deceased.

"The killer shot him twice?" After Li Meng saw the wound, he suddenly spoke.

Ren Qiushi nodded, and asked in a deep voice: "Under what circumstances, will the murderer start from behind the deceased?" ”

I pondered for a moment and said slowly: "Because the murderer has no way to attack from the front, he will choose this sneak attack to kill people. Maybe it's because you don't dare to start on the front, or maybe you can't start on the front......"