After intense and serious autopsy work, Ren Qiushi finally used toothed forceps to take out the murder weapon that was shot into the deceased's heart.

It was a metal product, and when it was placed in a metal tray, it crashed with a crisp sound.

Ren Qiushi and Zeng Lan carefully observed the so-called "hidden weapon" in the tray and felt very strange, because this kind of murder weapon was something they had never imagined.

"It's ...... Nail? Zeng Lan asked softly tentatively.

Ren Qiushi picked up the nail and looked at it carefully. He pondered for a long time, and said lightly: "To be exact, this one is a nail." ”

The nail is issued by the nail gun, and the nail gun is a product of modern nail fastening technology, which belongs to the direct fixation technology and is a necessary hand tool for carpentry, building construction, etc.

The lethality of the nail gun is huge, it can easily penetrate the steel plate and concrete, the energy can be as high as 120 joules or more, the advanced nail gun can use various materials and models of nails, powered by gas gas, the range can reach more than five meters, and the lethality is huge. The modified nail gun can easily shoot through the door panel ten meters away, and if the nail hits the human body, the consequences are unimaginable.

"This is the murder weapon, and the murderer used a nail gun to kill people." Ren Qiushi said seriously.

"This kind of killing is really rare." Zeng Lan muttered.

"Do a good job, after you have been a forensic doctor for more than ten years, you will not be surprised by any way of killing." Ren Qiushi said lightly.

He put down his scalpel, took off his gloves, put on a new pair of gloves, and prepared to perform the autopsy on the deceased male No. 2.

The two deceased in this case were both killed by the same murderer with the same murder weapon and at a very similar time, so the cause of death of the male deceased must be the same, both were shot by the murderer with a nail gun.

The male corpse, like the female corpse, had no scars on its body, including resistance, coercion, or restraint, except for a fatal wound on the left chest.

After opening the chest, cutting off the ribs, and observing the heart wound, Ren Qiushi also took out an identical nail from the inside of the heart of the male corpse.

The size and model of the two nails are exactly the same, both are 3.0x38mm gas nails, the material is 60# steel, after heat treatment, the core hardness of the finished product is HRC52-57.

At this moment, Ren Qiushi suddenly noticed that there was something strange.

"The angle of the wound on the body of Woman No. 1 was perpendicular to her body, indicating that the woman was killed while sitting in a chair and that the direction of the wound was on the same level as the muzzle of the nail gun. However, the angle of the wound of the body of the second male is somewhat downward, and the angle of the shot is from the bottom to the top, which indicates that the man was in a standing position at that time, and the muzzle of the nail gun was fired diagonally upward. Ren Qiushi frowned suddenly and muttered.

"This shows that the murderer is holding a gun in a lower position!" Zeng Lan suddenly realized and added abruptly.

Ren Qiushi nodded, he also agreed with Zeng Lan's opinion, and then explained: "The wounds of the two deceased are in the heart, which shows that the accuracy of the murderer's shooting is very high, and if you want to maintain such a precise shooting, you must practice aiming and shooting for a long time, and it also shows that the murderer's body position and gunman at that time were very low......"

"Could it be that the murderer was squatting on the ground and shooting? Then this is also too strange, why do you have to crouch on the ground to shoot? Zeng Lan was very puzzled and muttered to herself.

Or...... The murderer was relatively short. Ren Qiushi suddenly said.

"You mean, dwarfism?" Zeng Lan suddenly had a flash of inspiration and immediately asked.

Ren Qiushi didn't speak, he pondered for a long time, and said slowly: "This is not easy to conclude, you can sort out the autopsy report first and send it to the serious crime team." In addition, the blood of the two deceased, as well as biological samples such as gastric dissolutes, were sent for testing. ”

……

"Nail guns?!"

When everyone saw the autopsy report, they were very surprised by the murder weapon.

"The murderer kills people with a nail gun, and can still maintain such an accurate design to hit the heart, he must be a very experienced shooter." Xue Hang analyzed seriously.

"Xue Hang, if it's you, can you put the pistol on your waist and accurately shoot to the heart of the target without needing eye aiming?" I thought about it for a moment, and suddenly asked him.

Xue Hang hesitated for a moment, and then admitted very naturally: "Gunmen who have undergone long-term training, especially some special arms such as armed police and special police, can do it. But no one can guarantee 100% hits, especially in actual combat, affected by various on-site factors, no one can be 100% sure, and no one will choose this way of shooting unless it is absolutely necessary. ”

"So, you still need to aim for it, right?" I asked a seemingly nonsense question and confirmed to him.

After listening to me, Xue Hang nodded vigorously.

"Team Qin, why do you ask that?" Lin Zifan suddenly asked me, feeling very puzzled about the way I held the gun.

"Because the forensic department found that the angle of the nail shot in the male body was from the bottom to the top during the autopsy, it was inferred that the position of the murderer's gun was relatively low." I explained slowly.

"So you think the murderer will be shorter?" Li Meng looked at me seriously and asked.

"The current situation is like this, but as long as the technical investigation department deciphers the code of the surveillance video, it can find the surveillance video, and then everything will be understood." I paused and said quietly.

It didn't take long for Jiang Tingbai to come back from the Technical Investigation Department, and at the same time, he also brought us back the surveillance video of the crime scene.

Jiang Tingbai handed us the tablet, and the screen was playing the surveillance video at the time of the crime.

Surveillance footage shows that at 8:03 p.m. on November 1, the little boy He Mingxuan, with the help of his mother, put on a Halloween pumpkin costume, covered with a pumpkin-colored cape, and wore a pumpkin doll hood.

Then the little boy was very happy to go out and play with the little ones who were waiting for him at the door.

At 8:15 p.m., the little boy returned home, and his mother sat behind the desk at the cashier at the door, and she looked up at the child as if she were saying something to him.

But the next second of the surveillance footage made all of us widen our eyes.

I saw that the little boy suddenly raised his hand and pointed at his mother.

And the surveillance screen clearly shows that there is still an extra nail gun in his immature little hand at this time......