This is indeed a problem, and if you want to cut your head with a fishing line, you must have enough force. But judging from the scene, the fishing line seems to be tied to the car, and Shang Tieniu is driving the car, so it is impossible for him to have so much strength to cut off his head with the fishing line.

Deputy Director Gu suddenly pushed open the door and walked in, he heard that Qin Kai had come to the city bureau, and rushed to the morgue as soon as possible, just heard Mo Wenya's question, and said: "This is indeed a puzzling question, in addition, the city bureau is not sure whether Shang Tieniu committed suicide or not, and the city bureau has not yet formed a unified opinion on whether to file a case on Shang Tieniu's death." Qin Kai, I was also looking for you to hear your opinion. ”

"Director Gu ......," Xia Hongyun hurriedly said, "Judging from the scene of the crime, although Shang Tieniu is suspected of suicide, from my personal experience, I think this is not an ordinary suicide case, and there must be other reasons behind it." ”

"What about the evidence? Now what the city bureau wants to look at is the evidence, and only if you come up with enough evidence to prove that Shang Tieniu was killed by him, will the city bureau adopt your opinion and file a case for investigation. Deputy Director Gu sighed and said, "I know that Shang Tieniu is the elite of your first team and has participated in the investigation of many major and important cases, but what we do as criminal police officers is to respect objective facts and speak with evidence." ”

Xia Hongyun didn't speak, although she suspected that Ye Qingyu was making trouble, but she didn't have enough evidence to prove that Shang Tieniu died at Ye Qingyu's hands, all of this was her personal inference.

Qin Kai frowned and said, "Do you have any photos of the crime scene?"

"Yes!" Xia Hongyun went to the office and took all the photos from the crime scene, Qin Kai looked at it very carefully, and looked at each photo for a minute.

"Did you find anything?" asked Xia Hongyun.

Qin Kai nodded, pointed to a few photos and said, "Look at these photos, they are photos of a car crashing." There are a lot of glass shards about five meters behind the car, which is very unscientific. Because according to the angle of impact and inertia, the broken glass will only fly forward, not backward, how does the broken glass fall there?"

Xia Hongyun hurriedly took these photos, carefully compared what Qin Kai said, her frowning brows stretched tightly, and muttered, "Yes, why didn't I think of this?"

Qin Kai continued: "Also, look at these photos of the deceased. The deceased had a bruise on his right elbow, indicating that he had struck something with his elbow before he died, and I think it was the rear windshield. Due to the shape of the car, he was standing on the side of the rear of the car and struck it, so he got some dust on the belly of his clothes. ”

Mo Wenya subconsciously asked, "Why did Shang Tieniu smash the rear windshield?"

Xia Hongyun lowered her head and pondered, and after a while, her eyes lit up, and she said: "The answer is precisely to tie that fishing line, there is a telephone pole at the scene of the crime, just behind the back of the car, Shang Tieniu should have tied a fishing line to it, put it into the car, and tied it around his neck." Then he stepped on the accelerator and brake at the same time, and suddenly released the brake, and the huge force of the car sprinting out instantly cut off the head!"

Qin Kai snapped his fingers and said with a smile: "It's so smart, it's easy to get along." ”

"But, why did Shang Tieniu do this?" Xia Hongyun's heart sank, didn't this mean that Shang Tieniu committed suicide and died? Could it be that her intuition was wrong? Shang Tieniu's death really had nothing to do with Ye Qingyu?

Qin Kai saw that Xia Hongyun didn't speak, understood her thoughts, and said: "Then let's verify it from the opposite direction, is this someone forged? For example, the person was already dead at the time, and the murderer faked suicide in this way, but the various signs shown by the corpse proved that the deceased was alive when the body and head were separated. There is also an important corroboration that the deceased was wearing a clean police uniform, a police cap, a medal, and a lot of alcohol, all of which showed that he was determined to commit suicide!"

Xia Hongyun sat weakly on the chair, she wanted to prove that Shang Tieniu's death was killed by him, but in the end, it was proved that Shang Tieniu committed suicide, for a while, she didn't know what to say, and she didn't understand why Shang Tieniu didn't want to commit suicide? As far as she knew, his ex-wife had already been moved and agreed to remarry him. Moreover, Shang Tieniu is innocent, has not colluded with unclean people, and has not been corrupt or bribed, and is a very decent person. It stands to reason that it is impossible for a person like him to commit suicide.

But Qin Kai said so, is it still wrong?

Deputy Director Gu patted Xia Hongyun on the shoulder and said, "Don't be sad, Comrade Tie Niu is dedicated to the public, I will report to the Municipal Bureau and strive for him to be a martyr." ”

"Everyone is dead, what's the use of asking for those false names?" Xia Hongyun smiled bitterly and said to Qin Kai, "Qin Kai, thank you very much, it seems that my intuition is wrong, Comrade Tie Niu did commit suicide, and his death has nothing to do with others." ”

"Who says your instincts are wrong, your instincts are not wrong. Qin Kai continued to look at the photos, his face became colder and colder, and his eyes became very sharp.

Xia Hongyun said: "Didn't you just say that Shang Tieniu killed himself?

Qin Kai asked, "Let me ask you, did you find that fishing line at the scene of the crime?"

Xia Hongyun's eyes lit up, and she said in surprise: "We didn't find the fishing line at the scene of the crime, and it is impossible for a dead person to take the fishing line by himself, that is to say, there was a second person at the scene at that time." ”

Qin Kai nodded and said, "Let's assume that your intuition is valid, Shang Tieniu's mind at that time was controlled by others. A person's mind is controlled by others, and all his actions are subconscious. ”

Xia Hongyun said: "And it is impossible for a person to do complex and precise things by doing things subconsciously, for example, planning this suicide by himself and tying this fishing line by himself." All of this must be done by a clear-headed person. ”

Deputy Director Gu frowned and began to rethink the case, if Shang Tieniu really didn't commit suicide, it would be impossible for him to make these preparations when he was sober. If Shang Tieniu really planned to commit suicide, then where did the fishing line at the scene go?

All kinds of indications show that Shang Tieniu's death is likely to be killed by him, Deputy Director Gu thought of this, and couldn't help but gasp, the murderer's thinking is really meticulous, and he is very familiar with the police's thinking and logic in handling cases.

Mo Wenya said: "I have a question, the murderer is so shrewd, why did she take away the fishing line to make the police suspect her? With her ability, she can completely do it without knowing the ghost and leave us a flawless crime scene?"

This is indeed a question, why should the murderer do more?