"Crazy?" Yuan Jun didn't know what Jiang He meant, so he said, "Don't give up. How did the murderer leave? Just tell me."

Jiang He nodded, looked in the direction of Ge's house in the distance, and said, "I think everyone should have noticed that Ge Dongyun's bedroom is very messy. But Ge Dongyun himself is not an untidy person. We visited last time. Ge Dongyun's bedroom is very clean."

"That's right." Yuan Jun said, "That's right."

Jiang He stretched out his index finger, "So this is the premise. If we look at Ge Dongyun's bedroom today, we will find that Ge Dongyun's bedroom is a little too messy."

"If it wasn't for Ge Dongyun, then the murderer did it," Yuan Jun said.

"That's right, the murderer did it." Jiang He looked at Yuan Jun with no expression on his face: "And the murderer did it on purpose. I checked the room carefully, and I also saw Ge Dongyun's body. Ge Dongyun basically didn't have time to struggle. , was stabbed in the heart by the murderer, and died in almost a minute."

"And the position of the bed and the desk is farther away, even if Ge Dongyun struggled in this minute, he wouldn't have thrown everything on the desk to the ground, and the chair would have fallen to the side. If Ge Dongyun was struggling If you walk towards the door, you will definitely leave Ge Dongyun's **** footprints."

Jiang He calmly stated his opinion: "So from the point of view of probability, Ge Dongyun cannot create such an environment. If it is not Ge Dongyun, then it is the murderer. But why did the murderer do this? There are two possibilities. The murderer is looking for something. , what is the murderer trying to cover up?"

"It makes sense, continue." Shao Lao nodded seriously.

Jiang He continued: "If I was looking for something, then the things in the drawer must have been turned over. But when I opened the drawer, I found that the things in the drawer were neatly arranged, and the clothes in the closet were the same. The murderer just dropped something from the desk on the ground."

"So after this point is ruled out, I have 80% confidence that the murderer is deliberately covering up something." Jiang He said.

Yuan Jun scratched his head. While Jiang He was speaking, he was also thinking about it, but after thinking about it, he couldn't think of what the murderer was trying to cover up.

"So what was the killer trying to cover up?" he asked.

Jiang He replied, "A plastic water cup filled with water."

"Actually, when I saw the water cup beside the bed, I felt something was wrong." Jiang He recalled the scene when he just saw the water cup in Ge Dongyun's bedroom, and said, "The position of the water cup fell when Ge Dongyun was leaning against the window. The side of the bed, whether it is the bedside table or the desk, is far away from this place."

"In order to cover up the important role of this water glass, the murderer made books, pencil boxes and even chairs on the desk tossed around in an attempt to deceive the direction of our investigation."

Yuan Jun didn't recall the matter of the water cup at all. He didn't notice these little details at all. He asked, "The water cup, do you mean that the murderer used the water cup to escape?"

Jiang He nodded.

"The kind of water cup we drink from?" Yuan Jun asked again unwillingly.

"Yes." Jiang He said.

"How can the water cup help the murderer escape?" Yuan Jun asked again.

Jiang He put his right thumb on his index finger, making a crescent shape and said, "I carefully observed the lock on Ge Dongyun's bedroom window. It is a crescent lock like this. When the lock handle is facing up, the lock is open. ."

Saying that, Jiang He grabbed the index finger of his right hand with his left hand, pulled it down, and said, "And when the lock handle is facing down, the window is locked. But in fact, it is not necessary for someone to pull the lock handle. , and the lock handle does not need to be completely perpendicular to the ground, according to my observation, if the angle with the ground is within 20 degrees, it will be locked."

As he spoke, Jiang He seemed to be the murderer. He simulated:

"By coincidence or deliberate planning, the murderer sneaked into Ge Dongyun's bedroom. He stabbed Ge Dongyun's heart with a Western-style kitchen knife. The murderer must be familiar with this kind of knife, and it should be someone who has used it for a long time. After that , the murderer chose to leave from the window, and designed a plot to kill in a secret room."

"Before leaving, the murderer scattered all kinds of things on the desk on the ground to prepare for a short escape. First, the murderer left a space for himself to leave, pulled the crescent lock to the middle parallel to the ground, and then Hang a water-filled glass with a lanyard over the lock handle."

"Then, she quickly climbed out of the window from this space and closed the window." Jiang He's hand continued to gesture: "After that, there will be no murderer. Under the action of gravity, the water glass filled with water will inevitably hit the lock. The handle creates a downward force. This downward force replaces the human force, pulling the lock handle down."

"Finally, under the action of gravitational potential energy, when the lock handle was pulled down, the water cup also slipped from the lock handle and fell to the ground." Jiang He put down his hand and said, "And at this time, the window was also locked. . This is also the reason why the lock handle has an angle with the ground. If it is artificial, I have 60% confidence that the lock handle must be pulled to the bottom."

Jiang He has basically finished describing the whole process of committing the crime: "After that, he climbed down from the window sill. Based on my physical ability, it only took about three minutes."

After listening to Jiang He's narration, Shao Lao fell into deep thought, and after a while, he said, "This person must be very familiar with the Ge family. Whether it's the time to climb down from the second-floor window or lock the window with a water glass, this is not the case. An outsider was able to formulate and implement it."

"I'm just talking about the water cup." Shao Lao said: "If there is less water, then gravity is not enough to pull the lock handle down. When the police intervene, the water cup is likely to still hang on it. And if there is too much water, Then the lock handle will be pulled down in an instant, giving the murderer no time to get out of the window."

Shao Lao nodded himself: "Yes, that's it. From the murderer's death, and then from the murderer's leisurely use of the window to escape, if there is no comprehensive plan, and there is no long-term observation of the Ge family or even the Longling community, the murderer will escape. If you don’t leave, you can’t escape the surveillance.”

"This murderer must be a frequent visitor to the Ge family." Elder Shao was firm.

"An acquaintance of the Ge family?" Yuan Jun asked, "Could it be that the murderer knew Ge Dongyun beforehand?"

While pacing, Lao Shao said: "The murderer is likely to kill in the name of the person who left the note, and all major mainstream media are now speculating that. Killing in such a chaotic time can indeed confuse the police. , especially when the murderer took the initiative to find a reporter after the murder, which made the police even more incapable of doing things."

"The murderer is..." Before Shao Lao could say the name he guessed, he heard a voice from behind.

"Sorry officer, my son Dong Ai's access card has been lost." It was Mother Ge who spoke.

The few people turned their heads to look, and found that Mother Ge was holding Ge Dongai's hand standing behind them, and Ge Dongai twitched, looking very aggrieved.

"So I still need an access card." Mother Ge said in a low voice.

"Dong Ai's access card lost?" Shao Lao looked at Ge Dong Ai, who was still wiping away tears.

Mother Ge was a little embarrassed: "Yes, I just went home and was about to open the door, so I asked Dong Ai to take his access card, but Dong Ai searched in his schoolbag for a long time and couldn't find it. Only then did I know that Dong Ai took his own access card. The access card was lost."

As she said that, Mother Ge looked at Dong Ai and said angrily, "You can't do anything well."

Hearing her mother~'s criticism, Dong Ai burst into tears, her tears were like waterfalls, and she couldn't stop.

Shao Lao squatted down, hugged Dong Ai, and said kindly to Dong Ai like a grandfather: "Don't cry, tell grandpa, do you know when you lost your access card? "

Dong Ai cried and said in a childish voice: "I don't know, I usually put it in my schoolbag, but when I get back, it's gone. I didn't lose it, ooh~"

"Didn't you lose it? Could it be that you have long legs and ran away?" Mother Ge couldn't help scolding again.

Dong Ai burst into tears, no matter how hard she tried to coax her.

"Maybe someone stole it." Shao Lao rubbed Dong Ai's head and said, "After all, a child's access card is much easier to steal than other people's access cards."

"Steal?" Mother Ge felt a little weird.

Shao Lao nodded and said, "The access control system has a simple record. At 8:18, someone used the access control card to open the door of your house. After that, there was a murder case."

"That is to say, the murderer still has the access card of our house. He may come back to our house at any time, right?" Mother Ge suddenly felt extremely terrified and said tremblingly.

Shao Lao said: "Yes..."

But at this moment, Shao Lao suddenly thought of something, he said: "No, this matter is so noisy, so many eyes are staring at your house, even if the murderer is given twenty courage, he will not dare. Come. Don't worry, and there are our people in the dark to protect you."

"When your husband comes back, we will ask him to come back to accompany you after we inquire according to the procedure. After that, you can move out." With that, veteran Shao handed the access card to Ge's mother.

Veteran Shao put down Ge Dong'ai and nodded at Ge's mother: "We'll send your husband to the police station in a while, and he'll come back later, don't worry."

"Okay." Mother Ge nodded.

Looking at the back of Ge's mother leaving, several people were thoughtful.

"Where are we going at this time?" Yuan Jun asked.

Shao Lao looked at Yuan Jun and said with a smile, "The time is just right now, I'll take you to eat."

"It's good to eat." Yuan Jun licked his lips.