Chapter 207

Zeng Wei Guizao, who was identified as the murderer by Bai yanzhenyu, had sufficient alibi in the police station at the time of the crime. If you want to prove his murderer, you must infer how he killed his wife remotely more than ten kilometers away from his home.

"Look, the dagger on the back of the body."

At this time, Baiyan Zhenyu noticed an abnormality on the body and hurriedly reminded: "generally, if you use a dagger to kill, the dagger should be inserted into the body vertically, but the dagger on the dead's back is inserted horizontally, which is not in line with the holding method when using a dagger."

"What?"

The white bird police department and others were surprised when they heard the speech. They immediately looked at the dead man's back and found that, as Bai Yan Zhenyu said, the dagger was inserted horizontally into the body.

Officer Takagi squatted down, carefully looked at the stabbing angle of the dagger, and said in surprise: "it's true. If the murderer attacked from the back, he should stab the victim with the dagger."

Officer Sato also realized something was wrong, touched his chin and analyzed: "if the killer attacked from the side, it can make sense, but in this way, the killer will be found by the dead when he approaches. It is impossible to stay in place and let the other party kill her."

"The answer is very simple. The killer attacked the victim from behind, knocked her down on the floor, then pressed her two knees against the victim's neck and waist, and then killed her."

Probably eager to erect the dignity of the police department in front of the public, the white bird police department hurriedly explained without careful thinking, ready to prove the correctness of his previous reasoning.

Baiyan Zhenyu shook his head slightly and denied: "white bird police department, if the victim is pressed on the floor, in order to escape the restriction, he will struggle desperately. However, on the ground near the body, there is no sweat left during the struggle."

"This..." under the refutation of Bai Yan Zhenyu, the white bird police department was speechless for a moment, and I didn't know how to explain this doubt.

However, the discovery of this doubt makes Bai yanzhenyu realize a new possibility, that is, the murderer of Zeng Wei's wife is probably not a living person, but a mechanism that can be remotely controlled by Zeng Wei GUI.

According to this idea, the mechanism must be directly behind Mrs. Zengwei, that is, the empty bookshelf on the third floor, and the remote control is likely to be the phone call from the police station to Mrs. Zengwei.

Thinking of this, Baiyan Zhenyu began to investigate the site, carefully inspected every place, and dared not make any mistakes.

Before long, Baiyan Zhenyu made two new discoveries.

The first place is at the top of the bookshelf. There is a trace of blood on it, and the right side of the blood is very neat. There should be something like transparent tape, which was taken away after the crime.

The second place is the central shaft of the toothed disc of the fitness bike, which is rolled with a lot of money, a string like a kite string, and a small circle is tied at one end of the string, which may be used to hang somewhere.

These two new discoveries helped Bai yanzhenyu to infer the criminal technique used by the murderer. He immediately smiled and said, "ladies and gentlemen, I already know the murderer's technique."

"Eh? Bai Yan, tell me!"

Hearing Bai yanzhenyu say this, officer Gaomu and others immediately brightened their eyes and urged Bai yanzhenyu to tell the truth.

"The murderer first fixed the dagger on the top of the bookshelf, hooked it with a long thin line, then fixed the other end of the thin line on the pedal of the fitness bike, and then hid the dagger and thin line with dark bookshelf curtains to prevent Mrs. Zeng Wei from discovering the mechanism."

"When Mrs. Zengwei starts to exercise as usual, the thin thread will roll up slowly with the rotation of the gear, and finally pull the bookshelf down and stab the unsuspecting Mrs. Zengwei."

"Because the bookshelf next to it is full of books, the direction of this bookshelf will not deviate, and the falling place will only face Mrs. Zengwei."

"In this way, it explains why the dagger was inserted horizontally into Mrs. Zeng Wei's back."

Bai Yan Zhenyu's reasoning brightened everyone's eyes and immediately analyzed the feasibility of this technique.

After listening to Bai Yan Zhenyu's words, Zengwei made a row of cold sweat on his forehead, his body trembled slightly, took out his handkerchief and wiped the sweat on his forehead.

However, when he put the handkerchief back in his pocket, he could not help but frown. He quickly took out his fingers and sucked them in his mouth. It seemed that he was stabbed by something.

After a short analysis, the white bird officer frowned slightly and questioned, "if you wrap the thin line around the fitness bike as you said, the dead should feel that the pedal is getting heavier and heavier. Even if you don't see the mechanism behind you, you will certainly detect abnormalities?"

"Don't you know?"

Officer Sato looked at officer white bird in surprise and explained: "like this kind of fitness bike, the original design will slowly increase the load of users. Since the victims exercise every day, they naturally won't care."

Officer white bird smiled and continued to ask, "did the bookshelf fall to the ground when you found the body? Besides, it's easier to ambush here and kill the dead instead of sneaking in here and making these troublesome designs."

"It's really much simpler, but the killer needs to stay at the scene. If you use the mechanism, you can get a perfect alibi. As for the problem that the bookshelf doesn't fall..."

Speaking of this, Bai Yan Zhenyu smiled at Zeng Wei Guizao and asked jokingly, "what do you think, Mr. Zeng Wei?"

"Well... I don't know. When I came in, I didn't see the bookshelf fall down." Zeng Wei Guizao smiled, and a row of fine cold sweat came out of his just wiped forehead.

"Hehe, really?!"

Baiyan Zhenyu's eyes narrowed slightly and asked coldly, "tell me, why did you let officer Sato and officer Takaki check the second floor after we entered the room, but you entered the living room alone and stayed in the living room for dozens of seconds before you screamed?"

After hearing Bai Yan Zhenyu's query, Zengwei Zao's face changed greatly and hesitated to explain: "I... I was frightened by my wife's body, so I was stunned there for a time. After I got back to my senses, I cried out in fear."

Officer Sato heard Bai Yan Zhenyu's meaning and asked incredulously, "Bai Yan, do you mean that Mr. Zengwei killed Mrs. Zengwei?"

"That's right."

Baiyan Zhenyu smiled calmly and said definitely, "the murderer is Zeng Wei GUI Zao!"