"Wang Zixi has good hearing, according to her, she didn't hear footsteps, but heard the sound of something flying at high speed, we can rule out the possibility that the murderer killed with his bare hands, it must have been with the help of some kind of tool, similar to a bow and crossbow."

Fan Hua nodded when he heard this: "According to the wound situation, because the entrance is symmetrical, it can be considered to be an arrow, and the mismatch is that the arrow of the bow and crossbow is generally round-headed now, and I really don't know where to buy this ancient arrow and the mechanical bow and crossbow that matches it." ”

"I'll look it up after we've roughly determined the function." Ying Mingyu said back to the murder weapon, "The arrow was inserted into the heart, but instead of piercing the chest, it was quickly pulled out, causing the heart to be damaged and stopped, and the person died almost immediately, how did this happen?" ”

"Looks like you're still listening to what I usually say." Fan Hua was quite comforted to hear him say the terminology he usually used to judge the cause of death.

"Is it that the body of the arrow is only so short in the first place? Is there such a short crossbow? Fan Hua drew two parallel lines on the paper, the length equal to the depth of the wound.

While the two were pondering, Fan Hua subconsciously added the tip of the thin knife on his head that he thought at first.

"Toy knives?" Lu Qianqian finished distributing the coffee, and when he finally brought it here, he saw the pattern at a glance.

Fan Hua couldn't help laughing, looking at it this way, it's really thin, short or symmetrical knife head, isn't this a toy knife that a child is playing with in his hand?

"Mr. Fan, can I follow you to draw the murder weapon later?" After Lu Qianqian put Ying Mingyu's cup on his desk, he took the other cup and handed it to Fan Hua with both hands.

Fan Hua glanced at Ying Mingyu and shook his head: "I think you have heard what we just said, if you want to help, you can stay here and paint." He didn't understand why Ying Mingyu brought her to the police station, and it didn't seem that he planned to interrogate this girl again, so he took out a blank piece of paper from the folder on Ying Mingyu's desk and handed it to Lu Qianqian.

Ying Mingyu felt that the conversation was almost over, combined with the wound situation and computer technology, the simulation should not be a big problem, he was going to go with Fan Hua, and the murder weapon in this case must be the key.

Lu Qianqian was not polite, and after sitting down in Ying Mingyu's seat, he took a pencil from his pen holder.

"Boss, there's a self-inflicted snare here, do you want to try it?" Just as he was about to go out, Ding Yuan came to the door and asked.

"Excuse me." Ying Mingyu had no choice but to part ways with Fan Hua, and only after going out did he ask about Ding Yuan's situation.

"It's a sales manager of a cosmetics company, named Dong Dali. Wang Zixi has two jobs in their company this year, the first time is the company's internal annual meeting performance, that is, Zhang Jun met Wang Zixi, the last time was a roadshow performance, just ended. ”

Ying Mingyu didn't expect such a good thing: "What is he doing here?" ”

"He said that he saw Wang Xifa's circle of friends and thought something had happened to her, so he came to bail her."

That's a strange coincidence.

Before they sat down, Dong Dali was already shouting: "What are you doing, I'm here to bail Zixi, she's a delicate little girl, what else can she do to kill people and set fires, what are you doing to arrest her?" Still arrest me, are you police all idiots with water in your heads? ”

"She won't do it, so you'll do it?" Ding Yuan asked along with his words.

"What nonsense are you talking about! I sued you for slander, did you hear? ”

Ding Yuan didn't care, and after a short while, he continued: "We just asked Mr. Wang to come back to assist in the investigation, and I hope that Mr. Dong can also assist us in the investigation." ”

Dong Dali's brain seemed to calm down: "You ask." ”

"What are Mr. Dong's hobbies? Do you know how to play rock climbing, archery, etc.? "Although they previously decided that the use of props to kill people indicates that the murderer is not very strong, there is also a possibility that the murderer is familiar with this kind of thing.

Dong Dali shook his head: "I'm very busy at work, how can I have time to play those rich things, usually the most I usually do is to play cards and play badminton with my colleagues." ”

Ding Yuan glanced at the silent boss: "We asked Classmate Wang, you called her at half past one in the morning on the sixteenth of last month, why did you call her so late?" ”

Ying Mingyu is very satisfied with his team member, he has done his homework before, and he first asked Wang Zixi about the situation, and he will come to him if he is suspicious.

"Last month?" Dong Dali thought and thought, "Oh, I drank too much that day, and I don't even remember what we said." ”

"Alone or with whom?"

Dong Dali told him the information of his colleagues who drank together, and Ding Yuan asked him about his whereabouts yesterday afternoon, he said that he was in the company, and he also held a meeting, and his colleagues in the company could testify.

Let him wait here for a while, and Ding Yuan went out with Ying Mingyu.

"According to Wang Zixi, he is very suitable for the person we are looking for, and since the company's annual meeting, Dong Dali has often pestered her. That night, after she answered the phone and fed her, she threw down her phone and went to take a shower, so she didn't know what Dong Dali said, and the call record showed that he spoke alone for more than ten minutes. ”

Ying Mingyu did not speak.

Ding Yuan muttered to himself: "I only heard that the beautiful woman said to the spare tire that she went to take a bath and came to end the chat, but I haven't heard that she answered the phone and threw it aside to take a bath, this girl is too ruthless." ”

"There are so many people who are obsessed with their hearts, drive him away after verifying the alibi evidence, don't let him make trouble in the bureau." After Ying Mingyu left, he first went to see the situation on Wang Zixi's side, and Bao Zhan was asking her to recognize people related to Zhang Jun and Hu Ruochen, and see if she could find someone who the three of them knew together.

Before going to the technical department, Ying Mingyu returned to his seat first, he still had something to take. Seeing the person sitting on his seat who was scribbling, Ying Mingyu didn't bother, and when he took something to leave, he swept the picture she drew and stopped.

"You have such a thing?" Ying Mingyu's pupils shrank slightly, he had noticed it when he first went back to her dormitory, but things were messy, and he didn't find anything.

Lu Qianqian raised his head and shook his head: "Didn't you say that you have to take it back quickly after ejaculating?" In the TV I watch, some high-tech thieves don't have this kind of thing, they are quickly launched from their arms, and then after hooking something, they can hang people to move, and when they are finished, they will be retracted by pressing a button, which is similar to the principle of a tape measure. ”

"The other idea is a spring or a rubber band, but I'm still wondering what kind of structure it will be and how to control it."

Ying Mingyu called Fan Hua and asked him about the progress of the technology, and asked him to come back here first.

After Fan Hua looked at Lu Qianqian's semi-finished picture, he looked at this little girl again and again: "Where have you seen something similar?" ”

He asked this much more friendlily than Ying Mingyu, and a fragment really flashed in Lu Qianqian's mind: "Yes, I want to think about ......"

"Art class, it's impossible...... On the material, there is no ...... I think I've seen it somewhere......"

Fan Hua couldn't help but smile: "If this girl wants to think of her friend coming out, do you believe it?" ”

"It's a mystery." Ying Mingyu doesn't think this kind of thing will be sold anywhere.

"Oh, I remember!" Lu Qianqian was not as shameless as they said, "Handicraft class, yes, it must be." ”

"In your handicraft class, do such a dangerous thing?" Ying Mingyu disagreed.

Fan Hua answered with a smile: "Ying Shao, just arrest all the students in their school who take handicraft classes." ”

Lu Qianqian rarely heard that they were teasing her, and pouted: "Of course not, I've thought about it, I haven't seen it in other classes, and I haven't drawn a picture of holding this kind of weapon, so it's not a piece of material, it must be in the manual class, it should be someone's structural exploded diagram, right." ”

Ying Mingyu heard her words and asked, "Then who do you remember and when did you see it?" ”

Lu Qianqian was a little distressed: "It's not a recent thing, there are no classes in the senior year, the manual class is a basic course, and the freshman and sophomore years can be taken independently, depending on which teacher you like, you can add it to the class schedule by yourself, as long as the final homework is qualified, you can pass the test." ”

"Do your teachers keep each student's assignment?" Ying Mingyu felt that the thread had been found.

Lu Qianqian shook his head: "Everyone's work belongs to them, and they will be returned to us after the teacher approves them." ”

"It's possible that the teacher will remember such a special work, so why don't you ask someone about it?" Fan Hua came up with an idea.

"Don't you have a body in your hands? So free. Ying Mingyu said something about crossing the river and demolishing the bridge.

Fan Hua couldn't help but shake his head and prepare to leave: "I still dislike it when I don't need it, it's because I'm too talkative, and I shouldn't interfere in your investigation of the case." ”

"Do you remember which teacher's craft class you took?"

"It's simple, I'll go back and look at the list of teachers in the school, and I'll know." Lu Qianqian was a little uneasy when he said this, "That, if I remember wrongly, will I be held accountable for misleading the investigation?" ”

"It depends on whether you do it on purpose or with good intentions, if it is intentional, I can lock you up for a few days and then fine you some money."

"This is going to jail, too?" Lu Qianqian shook his head and sighed.

Ding Yuan was processing the transcript just now, and couldn't help but laugh when he heard this, is their captain really teasing that girl?

"Don't talk about this, what majors in your school need to take manual classes?"

Lu Asaki said: "Our school is a merger of the Academy of Fine Arts and the School of Music, in addition to the art major, there are also architecture-related majors. ”

"So, Zhang Jun is an architectural design major, and he also takes this class? Hu Ruochen is a choreographer. ”

Lu Qianqian nodded: "The course of architectural design is not a basic course, they have a modeling course, and it is estimated that there will be one this year." ”

"Speaking of such a delicate thing, the students of the art department may not be able to make it, so we will learn a little bit of skin." Lu Qianqian continued her broken thoughts, as long as it comes to professional-related things, she comes very quickly.

Zhang Jun's classmates? Ying Mingyu felt that things were going back in circles, and he had already investigated before, even if he re-investigated, he probably wouldn't find the murder weapon.

After a while, the technical department sent the printout, and Ying Mingyu compared Lu Qianqian's drawing and sighed. It is said that science and technology have progressed, but he can't see it, and the photos of the suspects made by computer puzzles are not as good as hand-drawn. Especially for the spring part, Lu Qianqian drew the details of the drawing, although I don't know how the finished product is, the degree of restoration is much higher than the computer synthesis drawing.

Ying Mingyu stared at Lu Qianqian, who was still concentrating on drawing, for a while, and did not speak.