Jian Jing walked around the crime scene, looking for suspicious points.
The sink outside could not be described as clean or dirty. There were a few strands of hair scattered on the countertop, the faucet was old-fashioned, and there were two drops of lip gloss in the basin that had dried up.
She remembered this color number, it should be Tang Yuran's, proving that she had indeed touched up her makeup.
The bathroom is just behind the door, and there is a mop and bucket behind the door.
She picked it up and took a look, and found red blood residue under the mop cloth. She smelled it closely and a strong stench covered everything.
Go to the third compartment and check.
The scene of Tang Yuran's death was covered in blood. The scene was so horrifying that it could scare many laymen.
But Jian Jing had already acquired some basic knowledge of trace detection. In her opinion, the bloodstains in the compartment were full of the word "unscientific".
First of all, Tang Yuran had several wounds on his chest, and a lot of blood was oozing out. There was no murder weapon, and it seemed that he was stabbed by a sharp object.
If this is the first crime scene, then when the murderer pulled out the murder weapon, a large amount of blood should have spurted out, forming a medium-speed impact bloodstain at the scene, that is, the blood spurted out under the pressure of the human body.
These blood drops are generally less than 4 mm in diameter and are irregularly round. In addition, there should be tiny blood spots scattered nearby.
But no matter how much blood there was in the compartment, the bloodstains on the door and partition left a long tail.
This is a typical throwing bloodstain, which only appears when a bloody weapon is waved or a bleeding limb is swung.
Could it be that Tang Yuran was dancing in the toilet while bleeding
In addition, most of the bloodstains were wipe-like bloodstains, which looked like horrible bloody handprints.
There was indeed blood on Tang Yuran's hands, but just imagine, a person seriously injured in the toilet, the instinct for survival would definitely drive her to open the door and go out to ask for help, instead of going crazy and leaving so many bloody handprints in the toilet.
The key point is, there was no blood on the bolt.
The most incredible thing is that even after some time had passed, the bloodstains at the scene still hadn't solidified.
You know, blood coagulates very quickly. If it hasn't coagulated for such a long time, either Tang Yuran has leukemia, or... this "blood" that looks like blood is not real blood.
Jian Jing leaned in to smell it and felt that the smell of blood was indeed too weak.
Even killing a chicken doesn't taste this good.
This is not blood, is it a prop? As far as she knows, sometimes in order to shoot a bleeding scene, some specially treated blood is needed, which may be pig blood or sheep blood. After adding anticoagulants, it can always stay fresh.
There was fake blood on Tang Yuran's hand, and when compared with the bloody handprint in the cubicle, the size matched.
Jian Jing judged that Tang Yuran had set up such a realistic scene for some reason, perhaps as a prank? But in the end, it became a false scene to cover up her death.
However, in addition to the fake blood, there were a few drops of blood that had dried up and looked like real blood.
These drops of blood are about 5 mm in diameter, and are typical drip-shaped bloodstains. They are very regular circles with certain uneven burrs.
When at rest, the burrs of the dripping bloodstains are of uniform length, but this is not the case when they are moving.
Based on the length of the burrs, the direction of movement can be determined - these drops of blood have shorter burrs near the door, and longer burrs near the inside. In other words, these are the drops that were dropped when a person walked into the toilet from outside.
Whether it was left by the murderer or Tang Yuran, it undoubtedly revealed a reality.
This is not the first crime scene.
The murderer killed Tang Yuran and moved her to this disguised murder location. He used some tricks to close the door of the compartment and disguise it as a crime scene.
Before leaving, he wiped off the other bloodstains, but did not notice that he left real blood in the cubicle.
Jian Jing walked out of the bathroom, paying close attention to the walls on both sides, and finally found another drop of blood on the edge of the stairs leading downstairs.
The men's restroom is below the women's restroom, could it be that... she turned into the men's restroom.
Nothing.
That's right, it's too strange that Tang Yuran died in the men's bathroom. It's hard for a girl to go into the men's bathroom without a reason. And the bathroom could be used by people at any time, so it doesn't make sense for the murderer to choose to kill people here.
Where is the first crime scene
There are classrooms everywhere in the building, and if a fight occurs anywhere, a lot of blood will be left.
Jian Jing looked around and observed every classroom, but found nothing. However, she found some suspicious blood spots in the women's restroom on the second floor.
There were some spots of coagulated blood around the innermost toilet bowl.
But it is hard to say what the bloodstains in the women's restroom were, and it may not have been left by Tang Yuran.
Even if it was, this might not be the first scene. If it was a murder in passion, it means that the other party had an appointment with Tang here or they just met by chance. Then the suspect must be a girl, but is Zuo Xin strong enough to carry her upstairs? If it was premeditated, they should have waited in the toilet on the fourth floor. No one would run down two floors to solve the problem instead of using the toilet on this floor, unless the toilet on the fourth floor was broken.
But she had just checked and found nothing wrong with the toilet on the fourth floor.
The likelihood is higher outdoors.
I must go back and take another look at Tang Yuran's body.
Jian Jing went back up to the fourth floor, put on disposable gloves for eating fried chicken, and examined Tang Yuran's body. Her body seemed to be a little stiff, but because she had no forensic knowledge, she could not determine the exact time of death and could only speculate based on other traces.
Tang Yuran's hair and clothes were not wet, so it was very likely that she had died before the rain and was taken back to the building by the murderer. There was some dirt on the soles of her shoes and the corners of her clothes, but the ground near the teaching building was all cement, so it was only in the small garden behind the building that it could be stained.
She made an appointment to meet someone there
etc.
Jian Jing was surprised to find that there were faint traces of blood on the disposable gloves.
She checked again and found a relatively hidden wound on the back of Tang Yuran's head. There was blood scab and some fine dirt particles in her hair. Was this a fatal wound? Was the knife wound on her body a post-mortem wound
Without knowledge, it is impossible to make a judgment.
Jian Jing felt overwhelmed and had to go back to the classroom.
As soon as she entered the room, Zuo Xin immediately reported: "Wang Hao has walked away, look at this video." Without waiting for Jian Jing to react, she quickly fast-forwarded to 22:35, and a scene facing the teaching building appeared on the screen.
"Look here." Zuo Xin is also a mystery enthusiast, and her observations are meticulous. "There is his shadow in the lower left corner, but at 36 minutes, the shadow disappeared from this side, and it never appeared again in the next few minutes."
Cameraman Wang argued: "Can't I stand somewhere else? There are too many mosquitoes there."
Jian Jing didn't comment, but just asked: "Did you take pictures of when it rained?"
"I took the picture. It started at 23:02," said Zuo Xin.
Jian Jing quickly calculated in her mind, very good, no one's suspicion was cleared.
She touched her chin and said to cameraman Wang, "Excuse me, please take off your shoes so I can see them."
"Why should I show it to you?" Cameraman Wang reacted violently.
Even President Hu sensed something was wrong and asked sternly, "Why are you reacting so strongly, Old Wang?"
"If she doubts you, you will be like me." Photographer Wang said coldly.
Just as Jian Jing was thinking about how to persuade them, footsteps were heard outside the door. Luo and Deng Daoju came back. Before they entered the door, they heard the two sides arguing and couldn't help asking, "What are you doing?"
"Have you found any clues?" Jian Jing asked.
Deng Daoju put a rhinestone-studded butterfly wing on the table: "I found this in the small garden at the back. It was from Tang Yuran's earrings."
Jian Jing had just examined the body and confirmed that a butterfly wing was missing from her earring: "Tang Yuran went to the small garden at the back. Who asked her out?"
Hu and Zuo Xin looked at Wang, the cameraman, and said in unison: "Take off your shoes?"
Cameraman Wang’s face turned pale.
However, he knew very well that the more he refused at this moment, the greater the suspicion would be. If he offended everyone, they might all hold him down and pull off his shoes.
After weighing the pros and cons, Wang, the cameraman, chose to take off his shoes: "What can this prove?"
There are traces of mud on the soles of the shoes.
"Yes, I've been to the small garden. Shouldn't I look around to take pictures?" He put his shoes back on and continued to argue.
Deng Daoju lowered his eyes and thought for a moment, then suddenly said, "When I went to wash my hands earlier, I went to the toilet and saw Tang Yuran going to the back. Haven't you seen her?"
"When?" Jian Jing asked.
"The paint was not easy to clean. It took me about ten minutes to wash it off. I went there after I was done. The window in the toilet was facing the corner of the building, and I saw Tang Yuran going that way." Deng Daoju explained, "I just remembered this, so I pulled Luo to the back to take a look."
Mr. Luo nodded, confirming what Deng Daoju said.
President Hu analyzed: "I went there around 22:20. You will be the next one to leave, Lao Wang. Did you make an appointment with Tang Yuran?"
"So what?" Surprisingly, Wang the cameraman admitted it. He said impatiently, "She and I have something to talk about. We agreed to chat in the garden. I'll put the camera away and go over."
Jian Jing raised her eyebrows: "How long have you been chatting?"
"It was two or three minutes. What we talked about was very simple." Wang, the cameraman, said, "She must have been followed to the bathroom and killed after she went back home. It had nothing to do with me."
Jian Jing thought for a moment: "Then when you asked Hu to come down..."
"We've finished talking. I was passing by the garden and thought there was a nice tree there, so I called him." Wang, the cameraman, gave a clear and coherent account. "Old Hu, when you came down, I was under the tree, right?"
President Hu nodded.
Zuo Xin asked, "You two separated later, right?"
President Hu nodded again helplessly.
Zuo Xin made a "just watch" gesture and said calmly: "This doesn't mean anything."
Jian Jing was the opposite of her. She felt that Cameraman Wang's admission of the meeting in Xiaohuayuan actually weakened his suspicion - although he had previously concealed his meeting with Tang, considering Tang's death, this mentality of avoiding suspicion was understandable - but if the first crime scene was the garden, then Cameraman Wang's admission would greatly increase his suspicion.
He could have easily said that the mud was picked up from somewhere else, such as sometime before coming here today, and there was no need to risk admitting it.
Therefore, his testimony is more credible. At around 22:40, Tang Yuran was still alive. Then, President Hu, Zuo Xin, Luo and Deng Daoju left one after another. Who is most likely to be the murderer