Chapter 198: suicide? Or murder?

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Mobile phone reading
Bai Yan's pupils shrank suddenly.
Without any hesitation, he pushed aside the passersby around the window and looked downstairs.
The woman in the red dress, at this moment...
Has fallen in a pool of blood.
Bai Yan's complexion instantly became extremely ugly.
He said solemnly to his girlfriend, "Amei, hit 120!"
After finishing speaking, Bai Yan glanced at the passers-by who had gradually gathered here, frowning.
Then, immediately walked down to the second floor without stopping.
At this point, downstairs.
Beside the woman in the red dress, many pedestrians have been surrounded.
The red-clothed woman closed her eyes tightly and fell into a pool of blood, with gurgling blood flowing out of her body.
The long and tangled hair has been stained with blood and turned red from the beginning.
Some of the timid girls who were watching had already let out a scream, covering their eyes in fear.
"Still... alive?"
The big men standing in the front row looked at me and I looked at you. No one had the courage to step forward and check.
However, falling from such a high building, the chance of surviving...
It can be almost zero!
After all, this large commercial building is twelve stories tall.
"Police, give in, police!"
Just as the onlookers were hesitant, Bai Yan, who ran upstairs panting, took out his police officer's card and shouted to the onlookers.
The crowd onlookers consciously gave way to Bai Yan.
Bai Yan came to the woman in the red skirt, squatted down, tried her breath first, and then opened her eyelids.
Under the gaze of the audience, Bai Yan gently shook his head and sighed helplessly.
A middle-aged man asked, "Police officer, she..."
Bai Yan smiled bitterly, "It can't be saved..."
Hearing Bai Yan's words, everyone sighed together.
With regret and perplexity on his face.
Looking at this girl who fell from the building, she was only about twenty years old, in the Mood for Love, why couldn't she think about it and just jumped off the building like this?
Obviously, in the thoughts of passers-by, the girl in the red skirt, 80% of whom couldn't figure out what was wrong, chose to commit suicide by jumping off the building.
Bai Yan got up, bowed his head around the corpse of the girl in the red skirt and turned a few times, dragging his chin, frowning and thinking.
Then he looked up and looked at the commercial building more than forty meters high. Finally muttered to himself, "Really, is it suicide?"
Bai Yan picked up the phone and called the Qingcheng Police Station.
"Captain Yang, it's me, Bai Yan!"
"On the side of the Vientiane Commercial Building in Chengnan District, a falling building just happened."
"It was a young woman who fell from the building. It has been confirmed dead."
"I still can't determine whether this is suicide or a long-planned..."
"He killed!" Bai Yan's words were taken by Cheng Nuo.
Cheng Nuo did not know when, and came downstairs.
Behind him, they followed Mu Leng and Su Xiaoxiao, as well as Bai Yan's girlfriend.
At this time, Cheng Nuo looked at the fallen corpse with a heavy face, and said in a certain tone, "Detective Bai, this fall from a building is not a suicide, but a...homicide!"
Bai Yan turned his head and looked at Cheng Nuo seriously, "Cheng Nuo, why are you so sure?"
Bai Yan also suspected that this fall case might not be a simple suicide case.
But at present, Bai Yan has no evidence to prove that this was a homicide.
The specific judgment will have to wait for him to obtain the specific identification information about the deceased.
But what Bai Yan did not expect was that Cheng Nuo could be sure that this woman was killed by him?
Facing Bai Yan's questioning, Cheng Nuo smiled faintly, pointed to the commercial building, and spoke slowly.
"Just now we saw the deceased on the second floor. When he fell in the air, the time he stayed in our sight was about 0.1 second."
"This commercial building was built according to strict standards. The height of each floor is 3.10 meters. The upper and lower floats are 0.02 meters."
"Of course, at the entrance on the first floor, there is a flight of stairs with a height of about 0.5 meters."
"Then the height of the whole building is about 47 meters."
"The gravitational acceleration of the location where our Qingcheng is located is 9.8146 meters per second. The weather forecast says there is no wind today, so ignore the influence of wind."
"According to the parabolic theorem, h=1/2gt^2. As I mentioned above, the deceased was on the second floor, that is, in the 3.10-meter displacement on the second floor, the time taken was 0.10 seconds."
"It can be approximated that when the deceased reached the top of the second floor, the speed was 29.58 meters per second."
"Therefore inferring that the entire process of the deceased falling from the building took 3.58 seconds. The displacement was 46.68 meters."
"So, the place where the deceased fell from the building must be on the roof of the building! Not on the other floors!"
Cheng Nuo glanced at Bai Yan, who had grown stunned and opened his mouth, and didn't know what to say, and continued his reasoning.
"We approximated the falling of the deceased into a horizontal throwing motion. If the deceased committed suicide, then the trajectory of her fall should be a vertical fall. Or, even if the deceased jumped forward for a short period of time before committing suicide. Then she was in The acceleration in the horizontal direction will only be 0.5 m/s at most."
"There is no wind today, so the influence of wind can be ignored. The resistance is too small, and the deceased's falling method is a vertical fall. The resistance is ignored and it does not affect the final calculation."
"According to calculations, if you commit suicide, the landing position of the deceased should be within 0 to 3 meters from the horizontal distance of the commercial building."
"But now?" Cheng Nuo pointed to the location of the dead.
"Obviously, the horizontal distance of the deceased from the building was 10 meters away. It was calculated that the horizontal speed of the deceased when he fell from the building was about 4 seconds."
"Unless someone is behind the deceased, giving the deceased a huge thrust. Otherwise, the falling position of the deceased will definitely not...here!"
Cheng Nuo stared at Bai Yan and said word by word, "This case of falling from the building is not an ordinary suicide. It is a premeditated... deliberate murder!"
Bai Yan immediately reacted ~EbookFREE.me~ and shouted at the crowd onlookers. "Everyone should stay away from the dead body to avoid destroying the scene of the crime."
After speaking, Bai Yan picked up the phone in his hand.
He was shocked by Cheng Nuo's analysis just now, but forgot, the call to Captain Yang has not been hung up.
Bai Yan said, "Captain Yang, are you still there?"
"Still?" Captain Yang replied, "Cheng Nuo next to you?"
Bai Yan glanced at the carrying pocket, looking around Cheng Nuo, who seemed to be searching for something, and nodded, "Yes, I happened to meet in the mall today. He is by my side now."
Captain Yang’s voice suddenly became extremely serious, "Bai Yan, I have heard Cheng Nuo’s analysis of this case just now. Although I am not at the scene, I guess that the data that Cheng Nuo said should not Wrong?"
Although he didn't want to admit it in his heart, Bai Yan nodded in order to solve the case, "Yes, I am not sure about the specific data, but there should be no errors in the analysis!"