Chapter 198

In the afternoon, Qingcheng police office.

Yang captain standing in front of the public, looking at the file in his hand, said with dignified tone.

"We have investigated the identity of the dead."

"The name of the dead: Han Xiaoxiao, age: 21 years old! He is a junior at Qingcheng University

"She has another identity Han Pingfeng, chairman of Haifeng group

Neigh -

when people heard the identity of the dead, they could not help frowning.

This identity It's tricky!

Haifeng group is one of the top 50 enterprises in China. Tens of billions of profits a year!

As the chairman's daughter, Han Xiaoxiao's position is very noble.

Can be such a girl, but today, xiaoxiangyu meteorite, let people regret.

"According to our survey, Han Xiaoxiao suffered from a certain degree of depression in her lifetime, since she broke up with her ex boyfriend," Yang continued

Bai Yan rubbed his chin and took captain Yang's words. He said, "if a man with depression jumps off a building to commit suicide, it can't be regarded as an incredible move. Therefore, the reason why criminals do not use other methods to kill Han Xiaoxiao is to make us think that Han Xiaoxiao's death is just a simple suicide! "

Yang's point of view is agreed with Bai Yan.

"By the way, detective Bai, have you got the surveillance of the mall?" Captain Yang asked.

"I got it. It's just that... " Said this, Bai Yan is also a face ache, "but, the top layer of monitoring has been broken a few days ago, so, we are not sure, who is the criminal."

If the monitoring on the 15th floor is broken, the police can't know who has been on the roof of the building except the dead.

Naturally, we can't pursue the murderer in time.

As for the specific murderer, you can check the monitoring on the 14th floor.

Cough

This is more difficult.

On the 15th floor of the commercial building, there is a high-end western restaurant. There are hundreds of visitors this morning alone.

If you go to the investigation one by one.

Even if the whole force of their police station is deployed, it will take at least 10 days and a half months.

By that time, I'm afraid the criminal will have run away!

"By the way, detective Bai, have you found anything on the roof of the building?" Captain Yang asked.

"Half a footprint." Bai Yan gently spit out these words. "However, with only half a footprint, we still have limited information."

"Can't we lock down the killer?" Captain Yang's eyes are full of hope.

Bai Yan shook his head with a bitter smile, "can't. At least not for a short time. "

"So..." Captain Yang took out his mobile phone, "we can only invite foreign aid!"

…………

Four o'clock in the afternoon.

The rooftop of the commercial building where the crime was committed.

Cheng Nuo a face reluctant to follow Yang captain and Bai Yan two people came here.

"You really don't want me, Captain Yang? No clue. Let me help you find the criminals? Don't you embarrass me Cheng Nuo complained as he walked.

Originally, Cheng Nuo, who had just invited guests and earned enough favor from Muleng and Su Xiaoxiao, just wanted to send the two girls home. Unexpectedly, Captain Yang called.

Ask Cheng Nuo is around the commercial building, let Cheng Nuo stay in place, he and Baiyan will arrive immediately.

Therefore, the confused Cheng Nuo was led to the roof by two men.

Looking at Yang captain and Bai Yan two people, looking at their eyes, there is a big gray wolf to see the little white rabbit feeling.

Cheng Nuo was a little flustered.

He subconsciously covered his chest.

There is no one on the left and right of the rooftop, which is not suitable every day, and the earth is not working.

These two guys are not going to

However, things are not as Cheng Nuo expected Ah, bah, it's the direction we don't want to develop.

Captain Yang and Bai Yan take Cheng Nuo to a position not far from the rooftop.

There, there is a relatively clear half of the footprints.

Bai Yan pointed at the footprints. That's the clue. "

"Next, Cheng Nuo, it's your turn to perform." Bai Yan shrugged.

Cheng Nuo looked down at the only clue that the killer left at the scene, footprints, rubbed his chin, and pondered, "it should be 43 yards."

Bai Yan rolled his eyes. "Of course I know that."

If Bai Yan can't even speculate on this, then Bai Yan should not be a detective here. Just go home and plant.

But the problem is that the customers who come to the 15th floor in the video surveillance images don't have the accurate data ability of Cheng Nuona. It's hard for Bai Yan to judge who's shoe size is 43.Cheng Nuo continued, "43 yards corresponding to the foot length is 26.5 cm. According to the standard height formula, height (CM) = footprint length (CM) × 6.876, that is to say, the height of the murderer is 182.29 cm. "

Bai Yan shook his head. "I know what you said. However, it is too accidental to calculate height with the length of feet. For a person who is over 1.9 meters, the shoe size may be only 40. For a person less than 1.6 meters, the shoe size is likely to be 44, 45. "

"Therefore, the height calculated from the footprints can only be used as auxiliary data to find the murderer. Instead of As the main data. "

Bai Yan is right about this.

It is always difficult to avoid the error in the height calculated by footprints.

If you lock in the wrong criminal, it's really useless.

"Don't worry. Let me see." Cheng Nuo gave Bai Yan a slightly calm gesture, staring at the footprints on the ground.

Then I looked up and glanced at the distance between the footprints and the edge of the rooftop and the height of the fence around the roof. In my mind, all kinds of data are constantly calculating and reasoning.

If he remembers correctly, the location of the deceased's fall from the building is in the direction of the footprints facing the guardrail in front of him, and the position after a straight translation of more than 10 meters.

The color of the toe of the footprint is lighter than that of the heel. This shows that the murderer's body was in a state of extreme force when he left the footprints. If I guess right, the killer must have left this footprint here when he pushed the dead downstairs.

The height of roof guardrail is 1.24 meters. The weight of the dead was 51.24 kg. Before the fall, the initial velocity in a horizontal direction was 3.85 meters per second.

The distance between the footprints and the edge of the rooftop is 0.54 meters. According to the location of the footprints, we can infer that the way the murderer pushed the dead downstairs was

In his mind, Cheng uses all the data he knows to build a model.

Then, we simulate the strength used by the murderer when he pushed the dead down the stairs, the position he stood on, the appropriate position and way of exerting force, as well as the optimal height and weight of the murderer with the way of exerting force

With this complex data operation. Cheng Nuo has barely done it, simple Time back!

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