The man who loves and chases the murderer lives next door

Chapter 426 Hit and Run (Part Two)

"inside?"

"It should be internal bleeding." Xia Lan took off her gloves and stood up.

"A car hit?" one of the policemen asked.

Xia Lan nodded, the policeman frowned, and then said, "Deputy Song, what do you think?"

"Traffic hit and run." Song Zhen expressed his judgment.

"Since it is a traffic accident, we will transfer this case to the traffic police."

"I've already called before, and I guess it will take a while to come here, but don't worry, this case also needs you."

The policeman didn't understand what the phrase "we need you too" meant. He was about to ask, but he heard his colleague shout, "The wheel patterns are different! Could there be two cars?"

"It's wrong, it's the same." Xia Lan denied his statement and explained to him, "There are two patterns, one is concave and the other is convex. Take a look, do they match exactly and can be buckled together?"

The policeman immediately observed it carefully, and even tried to draw it in the palm of his hand, and then opened his eyes wide, "Hey! Really! But why is it like this?"

Xia Lan's complexion was not very good. She glanced at Song Zhen and saw Song Zhen nodding at her. Then she said: "When the brakes of the wheels crush the human body, the wheels only rotate a little or no longer. Under the action of friction and extrusion of the tire convex surface, the skin at the contact part forms epidermal peeling and subcutaneous hemorrhage marks consistent with the tire convex pattern."

She paused, pointed to the abdomen and said, "This is the same as the ruts on the ground, it is a convex pattern."

"Then what causes the concave pattern?" The little policeman couldn't help wondering.

"When there is no brake to brake."

"You mean, the driver drove right over this man? Without any slowdown?" Another policeman caught on.

Xia Lan nodded, "When there is no brake and the front of the tire quickly rolls over the human body, the skin tissue corresponding to the junction of the uneven surface of the tire pattern is affected by the shear force on the one hand, and the leather is directly squeezed by the convex surface of the tire on the other hand. Capillaries, blood quickly flows to the skin in the concave area of ​​the tire, resulting in a sudden increase in the hydrostatic pressure in the blood vessels and rupture and bleeding, forming tire marks reflecting the concave surface of the tire. When the convex surface is squeezed violently, a convex surface contact area can also be formed Pale hollow concave subcutaneous hemorrhagic impression."

This pile of technical terms is a headache to hear.

However, in order to improve the efficiency of solving cases, Song Zhen had specially studied forensic science. Although it was far from Xia Lan's level, after listening to her explanation, she immediately understood it.

"So based on your judgment just now, the scar on Shen Minrong's thigh was obviously squeezed violently, that is to say, the car ran over his leg very fast?"

"Yes!" Xia Lan gave him an affirmative answer.

"The car braked the car and ran over the abdomen, but the thigh was run over quickly. This..." One of the policemen hesitated, a little confused.

The other one came to his senses, "Deputy Captain Song, Forensic Doctor Xia, what do you mean, the driver stepped on the brakes after hitting someone, then backed up, then accelerated and ran over the dead body?!"

As soon as these words came out, the scene was quiet and fell into a strange atmosphere.

Thinking about it carefully, I was terrified that someone hit someone and didn't save him. Instead, he slammed the gas pedal and completely ran over him to death, and even drove away from the scene.

"The traces at the scene also explain everything." Song Zhen's eyes fell on the right side of the corpse, "According to the rut marks, it can be seen that the traces on the right side of the corpse overlap and stagger, and the patterns are exactly the same, while the traces on the left side of the body There was only one clear line in the place, and the blood stain was obviously thicker, which ruled out the possibility that two identical cars ran over the corpse. From this, it can be speculated that the owner of the car noticed something strange after the wheels ran over the deceased's right hand and lower abdomen. Then I got out of the car to check, and I didn't know why I chose to reverse the car, forming overlapping marks, which also corroborated Xia's judgment."

The two policemen finally realized why Song Zhen said they were also needed.

The owner of the car hit and fled, and when the traffic police came, if it was determined that a criminal case was involved, they would still have to be transferred to the criminal police. The incident happened in their jurisdiction, and their police station would naturally not be able to escape.

"I've seen that there are no surveillance cameras in this old residential area. To find out who is the perpetrator of the escape, it is estimated that the scope must be expanded. However, the shirt opening exposed by the sleeve of the deceased's right hand was stained with a black paint-like substance. It can be judged that the other party opened the door. It's a black car." Song Zhen said.

Hearing this, the policeman collecting physical evidence immediately looked towards the crushed right hand of the deceased. He was collecting physical evidence from the corpse, but he hadn't seen the traces of the deceased's cuffs yet. He didn't expect Song Zhen to be so sharp-eyed.

"Deputy Song, you are amazing!" He couldn't help admiring.

"It's just because I came 10 minutes earlier than you," Song Zhen said modestly, and immediately pointed to several places.

Hearing Song Zhen's reminder, the policeman immediately collected physical evidence as if by a miracle.

Xia Lan frowned, "The fatal injury was the abdomen, which is the injury caused by the first time the car owner hit someone, but this person actually..."

In order to prevent people from being completely dead, they drove over people again, which is simply insane.

"Internal bleeding usually doesn't kill you on the spot." Song Zhen raised his eyes and analyzed the owner's psychology. "From the brake marks, we can judge that the speed of this car was about 60 yards at that time. Driving 60 yards on the road is considered fast, and there are sharp turns everywhere. This kind of speed is basically similar to playing drifting. It can be inferred that the driver is either a hot-blooded person who just likes excitement, or is extremely unstable and is driving a car."

"A prank car?" Ji Qian whispered, a little confused.

"Why did you get out of the car?" Song Zhen turned around and saw her standing behind him wrapped in the thin quilt on his car.

(End of this chapter)