After rebirth, I rely on solving cases to reach the pinnacle of power

Stride...

Step angle...

Step length...

Center of gravity...

Everyone has heard of footprint identification and analysis.

We also know that some ruthless people can get a lot of information about suspects based on footprints.

But who are those ruthless people?

Which one is not a nominal expert baby of the provincial department.

Which one is not white-haired and has experienced the baptism of thousands of cases.

But Qin Chuan's?

It has only been a month since graduation.

Are all police schools so awesome now?

Will they still say that they are too bad?

Everyone, including Zhou Xuexue, shifted their eyes from Qin Chuan to Song Yang and Chen Dejun.

The meaning is very clear.

You two are on-site investigation criminal police, specializing in administrative on-site investigation.

Tell me, is what Qin Chuan said right?

But these two people are now like Trojans, staring at Qin Chuan stupidly.

It seems that they can't be relied on.

The captain of the third squadron, Dong Houde, was the first to react.

In the Criminal Police Brigade, he was known for his resourcefulness.

"Captain Qin, even if the information you obtained about the murderer based on the footprints is correct, but... there are so many people with similar height and weight, why did you say it was the hostess next door?"

"Good question!"

Qin Chuan wanted to give Dong Houde a thumbs up.

What's the fear of pretending to be awesome?

The most fearful thing is that no one will cooperate.

Now it's good, the supporting actor finally took over.

"You are right, footprint identification can only lock the approximate range of the suspect. Without the other party's footprint comparison, it is indeed impossible to directly lock a person."

"But, everyone, look at these two footprints."

Qin Chuan chose the footprints near the door, from the outside to the inside.

"These are the footprints of the murderer after entering the room. The right foot is clear, the left foot is blurred, and the center of gravity is obviously biased to the right."

Everyone looked over and saw that it was true.

"Why is this the case?"

Dong Houde cooperated very well and raised questions in time.

"Because the murderer has a disability in his left leg!"

Wow!

As soon as this was said, everyone whispered.

And the look he gave Qin Chuan gradually changed.

Because the hostess of Room 302 opposite was indeed disabled!

Could it be that what Qin Chuan said was true?

"Captain Qin, what you said does make sense, but... look at this set of footprints."

Dong Houde was able to become the squadron leader, so he was naturally not a good-for-nothing.

"This set of footprints, with the toes pointing outward, should be the footprints of the murderer leaving, right?"

Qin Chuan nodded, what Dong Zhijun said was indeed correct.

The footprints of the murderer entering the room, with the toes pointing inward.

When leaving, the toes pointed outward.

Very easy to distinguish.

Dong Houde continued to raise questions: "But why are the clarity of the left and right feet of these two footprints almost the same?"

"It is impossible for the murderer to be disabled when he came in and not disabled when he left."

Yes!

Everyone nodded.

"Captain Dong is right. The murderer couldn't have been disabled when he came in and was fine when he left."

"Yes, that doesn't make sense."

"Could Captain Qin have made a mistake?"

"Don't worry, listen to what Captain Qin has to say."

Sure enough, Qin Chuan waved his hand, signaling Dong Zhijun not to worry.

"Captain Dong, before answering your question, I want to ask everyone a question."

"Who knows how heavy an adult's head is?"

Hmm?

This question...

Although everyone present is a criminal police officer, they really don't know much about this.

Zhou Xuexi frowned slightly.

He didn't understand why Qin Chuan asked this question.

However, he had come across a headless corpse case.

He checked the information here.

"The head of an adult is generally 4.5 to 5.5 kilograms."

Qin Chuan didn't expect that Zhou Xuexi would give the answer.

He thought that the forensic doctor Chen Guangzu would know.

But the other party didn't say anything.

This also proves once again that Chen Guangzu did not deliberately pit himself when he inspected Dong Zhijun's body last time.

He really doesn't have the ability.

"Director Zhou is right."

"The weight of an adult's head is indeed in this weight range."

"Of course, some particularly obese people will also exceed the maximum weight of 5.5 kilograms."

"But no matter fat or thin, the weight of a person's head should be about 7.7% of the body weight."

"The deceased Zhang Jun is 170 cm tall and obese. His estimated weight is 70 kilograms."

"So, the weight of his head should be about 5.3 kilograms."

"Now, let's talk about why the clarity of the left and right foot marks is not much different when the murderer left."

"Because when the other party left, he held the victim's head in his left hand!"

"The weight of 5 kilograms completely wiped out the difference in the left and right foot footprints caused by the murderer's disability. "

Fuck!

Is that the case?

Everyone suddenly realized.

"Not necessarily."

But at this moment, a voice came slowly.

Zou Mingyi!

Zou Mingyi was not deliberately looking for trouble, he really felt something was wrong: "Generally speaking, people should be used to lifting things, especially heavy objects, with their right hands."

"So, why did the murderer have to lift the head with his left hand?"

Fuck!

You are worthy of being a leader.

This is a good question.

Who stipulated that the murderer must lift things with his left hand?

You should use your right hand.

Everyone looked at Qin Chuan again.

Want to see how he explained.

Qin Chuan looked at Zou Mingyi with a strange look.

He thought that no one would be his backup this time.

Just when he was worrying about how to say the most pretentious part, it turned out that Zou Mingyi sent an assist!

"Secretary Zou is right! ”

Qin Chuan raised his right hand.

“Normal people, when lifting heavy objects, will use their right hands, but…”

Qin Chuan raised his left hand again: “What if the other person is left-handed?”

Left-handed?

This time, Qin Chuan did not wait for everyone to ask questions, and walked directly into the room and stood next to the neck of the deceased.

“There are obvious sawtooth marks on the neck of the victim. The murderer should have used a tool such as a hacksaw to saw off the head of the deceased.”

Qin Chuan looked at the forensic doctor Chen Guangzu: “Forensic doctor Chen, am I right?”

Although Chen Guangzu’s ability is indeed a little bit worse, he still has this kind of eyesight.

“The murderer did use a saw to saw off the head.”

“As you know, the saw teeth of the saw are all in one direction. Look at the direction of the saw teeth at the wound on the neck of the deceased.”

Qin Chuan stood up and made a gesture of holding a saw.

“Combined with the direction in which the deceased was lying, the murderer should have held the saw in his left hand at the time, which would have caused the sawtooth wound in this direction. "

Qin Chuan looked at Chen Guangzu again: "Forensic Doctor Chen, am I right?"

"Captain Qin, you are right."

Chen Guangzu nodded like pounding garlic.

Qin Chuan stood up and left the body.

Looking at Zou Mingyi at the door: "So, based on the scars on the neck of the body, I judge that the murderer is left-handed."

"So, when the murderer left with the head, he should have been carrying a heavy object with his left hand!"

Qin Chuan's series of analyses cannot be said to be well-reasoned.

It can only be said that it is quite well-reasoned.

While Qin Chuan was explaining, he had already arrived at the door of 302 opposite.

"If I am not mistaken, the head of the deceased may be frozen at the bottom of his or her refrigerator. "

Click.

When the door was opened, the hostess of Room 302, whose face was extremely pale and she had collapsed on the ground, came into everyone's sight.

Obviously, the other party had heard all of Qin Chuan's analysis through the door.

Qin Chuan put on gloves and went straight to the refrigerator in the kitchen.

Zhou Xuexi and Zou Mingyi followed him in.

Swish!

Opening the refrigerator door of the freezer compartment below, Qin Chuan directly pulled open the bottom compartment.

A head with eyes wide open was lying quietly inside.

The white pupils were staring at the three people!