The criminal police quickly locked the house and began to look for clues in the house. Xu Yiman had already gone back with the team for further autopsy, while Jiang He and Shao Lao stayed here to continue searching for useful clues.

"What did you find?" Elder Shao stopped in front of the blood-splattered wall and asked Jiang He.

Jiang He touched his chin: "The grandma next door heard a quarrel coming from the opposite door last night, accompanied by the sound of broken glass, etc. Although the grandma has bad ears and misunderstood her words, but the sound You must have heard it, right?"

Shao Lao nodded: "And it seems that the voice of the two arguing should be loud, even if there are two wooden doors, the old man can hear it."

"Someone cleaned up the glass shards afterwards." Jiang He picked up the trash can bag and said, "Grandma heard the sound of glass breaking, which should be the sound of the glass breaking. But there is no blood on the glass shard, and That is to say, the murderer did not attack Wang Ziyi with this glass. But the question is, after the quarrel was motivated, someone swept the glass fragments into the trash can, is it Wang Ziyi or the murderer?"

Old Shao watched Jiang He pick up a piece of glass from the garbage bag and said, "Take it back and check for blood. If it was done by the murderer, then the glass shard may be the murder weapon. Even if the murderer cleans up the shards The bloodstains can also be detected by technical means."

Jiang He nodded and said to Elder Shao, "I think we need to simulate the crime scene."

"First of all, Wang Ziyi's wound is on the right side of her neck." Because of Jiang He's unforgettable ability, he quickly described the characteristics of Wang Ziyi's neck wound: "The wound is about five centimeters long and vertical from top to bottom. Straight. The wound at the upper end is slightly shallower and the wound at the lower end is slightly deeper, which means that the murderer stabbed Wang Ziyi's neck from the bottom up."

Shao Lao nodded. He stood at the position where Wang Ziyi's body was found, lowered his body slightly, and said, "This means that the murderer must be taller than her. Wang Ziyi is about 1.6 meters tall. As a male, his height It's normal to be taller than her, which is in line with the laws of human mechanics."

"But the problem arises." Jiang He shook his head and said, "Judging from the blood-splattered wall, the murderer must have pierced her carotid artery, and then quickly pulled out the knife. The wound was very short, A large amount of blood spurted out of such a narrow wound, which caused the entire wall to be almost covered in blood..."

Shao Lao turned his head to look at it and said, "Yes, the arterial pressure is astonishingly large. Under certain circumstances, spraying at a height of four or five meters is not a problem."

"So, I can come to a conclusion that Wang Ziyi's neck wound must be directed at this wall, otherwise the blood will spray to the other side." Jiang He said to Shao Lao, "In other words, from the door Come in, Wang Ziyi's right side is facing the right wall, her back is facing the door and she is facing the window."

Shao Lao nodded, this old-fashioned building area is about 50 square meters, one room, one living room, one kitchen and one bathroom, and the living room area is pitifully small. The entrance is at the south end of the right wall. After entering through the door, there is a row of sofas against the right wall, and the left wall is the bedroom door and the bathroom door. In the empty space on the wall, there is a small TV.

The south wall is the door of the kitchen. There is a refrigerator and a water dispenser next to the door. It is the kind of purifying water dispenser that does not need to buy buckets of water. The living room's window is not on the south wall, but on the north wall, which belongs to the shady side.

In other words, Wang Ziyi should be facing the window with her back to the door at that time.

"That's right." Shao Lao thought for a while and said, "She is indeed facing the window."

After speaking, Shao Lao understood what Jiang He meant: "You mean, the murderer probably attacked Wang Ziyi from behind while she was not prepared?"

Jiang He nodded, then shook his head again: "This has to be considered from two aspects. First, if Wang Ziyi had his back turned to the murderer, the murderer would stab her in the neck."

As he said that, Jiang He walked over to Elder Shao's back and poked his neck lightly with the fingers of his right hand.

"If this is the case, it means that Wang Ziyi seems to be unprepared for the murderer. She did not expect the murderer to attack her. After cleaning up the glass debris, Wang Ziyi didn't want to look at her, so she faced the window."

Shao Lao repeatedly mentioned several possibilities: "But it all shows that Wang Ziyi has a good relationship with this person."

"There is another possibility." Jiang He walked to the opposite of Shao Lao, and faced Shao Lao head-on and said, "If the two are in a face-to-face relationship, that means the murderer should be by the window, so that the distance between the two The location is not too close.”

"No one will get too close to the quarrel, it's like flirting." Shao Lao said.

"Then the murderer is left-handed." Jiang He gently poked Old Shao with his left index finger.

At this time, Shao Lao stood up straight and said: "Yes, the force is pierced vertically from top to bottom, it is impossible to pierce the other side with a backhand, in that case, the direction of force will be completely changed. The wound should be in a relatively horizontal orientation."

Another picture appeared in Shao Lao's mind. After the glass was broken, the two had a period of time to ease the conflict. The murderer leaned against the window, while Wang Ziyi bent down~ and began to pick up the glass fragments. When Wang Ziyi walked towards the murderer, the murderer unexpectedly stabbed Wang Ziyi's carotid artery.

After that, just as the old grandmother said, the sound was gone, and everything was calm.

The carotid artery spurted blood, leaving Wang Ziyi only a minute or two, and during this time, fear may have swept over, and she didn't even have time to call for help, she fell in a pool of blood.

"Both of these are possible." Shao Lao said: "But if the murderer is Lu Zhengye, won't Wang Ziyi have any protection against him? Lu Zhengye has been imprisoned for ten years. Whether it is murder or deserved, Wang Ziyi should understand. , it was the evidence that I kept and sent Lu Zhengye into prison by himself. Check to see if Lu Zhengye is left-handed, if the murderer is Lu Zhengye, there is a higher chance of face-to-face situation. "

After a pause, Mr. Shao continued: "After all, there has been a fierce quarrel between the two of them, and everyone knows the next step of the fierce quarrel. Especially in the face of those who have hatred with them, how can they be at ease? Give your back to the other party."

"I'll call Captain Liu." Jiang He said, "Let him check if Lu Zhengye is left-handed..."

Mr. Shao was looking out the window at the moment. He noticed that the curtains in the living room were not drawn. He paid attention to the building opposite. If there were people on the opposite side that night, he might be able to directly see what happened at Wang Ziyi's house. But no one called the police, indicating that no one saw the murder, but even so, if anyone saw who came to Wang Ziyi's house, it would be a big clue.

"Jiang He!" Shao Lao pointed to the building opposite, and said, "Take someone to visit and ask to see if anyone has seen Wang Ziyi's house before, not necessarily the scene of the murder, after all, it was just an instant. The murderer turned off the lights when he left, but when they were arguing, it was definitely not in a dark environment."

"I know." Jiang He nodded.

Shao Lao said: "I also need to confirm the statement of the old lady next door. After that, I will go to you."

With that said, Mr. Shao pushed open the door and walked to 601. He knocked on the door heavily, and then heard a shout from inside: "Who is it?"

"Me! Old sister." Shao Lao shouted, "We met just now."

"Oh, loud!" When the old grandmother's words entered Shao Lao's ears, the old grandma had already opened the door for Shao Lao. This made Shao Lao wonder if the old grandmother had been standing behind the door and eavesdropping on the movement on the other side.

"What's the matter?" the grandmother asked.

"Ask you something!" Shao Lao said.

"Want to eat tomatoes?" The grandmother nodded and said, "Come in, come in, there are tomatoes."

Saying that, the grandmother walked into the house by herself with a cane. Don't look at the old grandma's legs and feet, but the speed of walking in small steps is not slow. After a while, the grandmother washed a few tomatoes for Shao Lao: "If you eat this, I have no teeth and can't bite."

Shao Lao nodded, you are welcome, although Shao Lao is 60 years old, but in front of this 80-year-old grandmother, he is even a child.

"The man you saw yesterday!" Shao Lao said while eating tomatoes, "Did you see blood on his clothes?"

Either way, just by looking at the unbelievable blood wall, you can tell that the murderer must also be sprayed with blood. And the grandmother came out to check the situation when they stopped arguing, that is to say, the murderer didn't have time to wash and cover up the blood on his body at all.

"Blood?" The grandmother heard clearly this time: "How old are you, how can you eat a piece of blood tofu and fall off yourself?"

"You mean, you didn't see blood on him?" Shao Lao asked.

The grandmother nodded and said, "I don't have very good eyes, but he was wearing white short sleeves that day. If there is blood, I can definitely see it. However, I was looking at his back, but I didn't see his front. Is there any blood? Look at you, how old you are, and you get the juice on your clothes when you eat tomatoes."

"I'll wipe it for you." With that, the grandmother wiped the tomato juice on Shao Lao's clothes with a handkerchief.

Shao Lao smiled and asked again, "Is it the only man who came that day, did the others come?"

"Anyway, I heard the two of them quarreling." The grandmother said, "I don't know if anyone else has been there."

"How do you know that they are married?" Shao Lao couldn't help asking.

"Speculation, do you understand what is called speculation?" The old grandmother looked at Shao Lao and said, "They all talk about eating, so they must be husband and wife."

Shao Lao couldn't help laughing.

"Young man, you have to learn more!" the grandmother said: "I am eighty-two years old this year, and I have read a lot of things. Have you read "Criminal Mind Simulation and Research" written by Shao Shilin? learned from this book."