"Yes, yes, Officer Su, how did you get the height of the murderer and the differences between the three people?"
Everyone at the scene looked at Su Yan expectantly, hoping to understand their confusion.
Su Yan smiled slightly. He pointed at the first two people again and said, "Look at the lighting of the street lights after these two people passed by."
Everyone followed the picture pointed by Su Yan and looked carefully again.
"Ah!" Xu Cheng suddenly shouted, "One of them completely blocked the street light, while the other person only blocked part of it, and a part of the light was exposed."
Seeing that Xu Cheng understood, Su Yan nodded appreciatively: "Five minutes later, the tall man who completely blocked the street light went back, but the short man did not leave the scene for a while."
"Look at the appearance of the third man. He only blocked the street light a little, which means that the third man is smaller than the short man."
"Twenty minutes later, the third man also left, but the short man never left."
"This shows that the short man is the deceased. Of course she would not leave after she was killed, while the tall man only spent five minutes walking past the street light to the toilet and then back again."
"So this person can't be the murderer. He should be the person the deceased was dating, but for some unknown reason, he left the deceased behind and left, causing the deceased to be killed by a third person."
"Now we know that the deceased Zhang Yun was 1.6 meters tall, so the third person should be under 1.6 meters tall."
When Su Yan finished analyzing all the situations, the fat security guard was completely stunned. He looked at Su Yan as if he were looking at a god.
"You...did you deduce these?" the fat security guard asked Su Yan stammeringly.
Su Yan looked at him and asked, "Is there anyone in the factory who is under 1.6 meters tall and is male?"
For a moment, everyone's eyes were focused on the face of the fat security guard. There were definitely not many men like this man who was under 1.6 meters tall.
Unexpectedly, the fat security guard thought for a long time, then shook his head and said: "It seems that there is no such person in our factory. A man under 1.6 meters tall does not meet the recruitment standards!"
When everyone heard this, their hearts sank. Director Zheng immediately said seriously: "If you think about it again, as long as they are from the factory, not one of them can be left out."
The fat security guard thought for a while and shook his head again: "I can't remember this person in the factory."
Su Yan and others frowned.
At this time, a security guard nearby said: "Captain, the old man who sweeps the garbage is under 1.6 meters tall."
Upon hearing this, the fat security guard suddenly slapped his forehead and said excitedly: "Why did I forget him? Yes, the old man who sweeps the garbage is indeed only about 1.5 meters tall."
"How old is Old Geng?" Director Zheng asked immediately.
"Although we all call him Old Geng Tou, he is not too old, only in his forties." The fat security guard immediately replied.
"Take us to find this old man." Su Yan stopped talking nonsense and asked the fat security guard to lead the way to find the old man.
"Old Geng was a sanitation worker in the factory. Since he was alone, the factory gave him a room where he could eat and live."
As the fat security guard said this, he took Su Yan straight to the old man's residence.
Because someone died in the factory, work was temporarily suspended, and the door was blocked by Zhang Yun's family, so the workers were trapped inside the factory.
Along the way, they saw so many police officers hurrying along, and they followed them curiously.
After a while, everyone arrived at Lao Gengtou's residence. It was a small house. The door was a solid wooden door, but it was locked from the inside.
"Old Geng, are you at home?" The fat security guard pushed the door. When he couldn't push it open, he knocked on the door and shouted.
After waiting for a while, there was only a "wuwuwu" sound coming from inside, but no one answered.
"problem occurs!"
When Su Yan heard this, he kicked open the wooden door and rushed in first.
Everyone was shocked by Su Yan's kick. Although it was a wooden door, it was made of elm and was very strong, but Su Yan kicked it open.
When everyone rushed in, they saw a man on the ground squirming and foaming at the mouth. He was obviously poisoned.
"..."
The poisoned man wanted to say something, but no sound came out, and his outstretched palm also fell halfway.
"died!"
Su Yan checked the poisoned man's breath and found that he had stopped breathing.
"Old Geng Tou was poisoned and died?" The fat security guard was stunned.
Su Yan stood up slowly: "Is he the old man?"
The fat security guard nodded: "Yes, he is the old man."
When everyone heard this, their faces were full of frustration. They thought that the case would be solved if the old man was found, but they never thought that the old man was poisoned to death.
Su Yan looked at the bowl of noodles on the table, only half of the noodles were eaten.
"Take it back for testing!" Su Yan said in a deep voice to the criminal investigation technician next to him.
A criminal technician immediately put on gloves and rushed the half bowl of noodles to the city bureau for detailed testing.
"Old Geng Tou should have wanted to say something before he died, but he couldn't make a sound!" Xu Cheng squatted and carefully observed Old Geng Tou's body, and finally shook his head in disappointment.
Su Yan was speechless. He said to several security guards: "Go and give me a copy of the factory roster. Remember, it must be the most detailed. No one can be omitted!"
Several security guards immediately agreed and went to get the roster.
As several security guards left, the onlookers were outside the door. Only people from the criminal police team and the police station were present.
At this time, Su Yan said in a deep voice: "The last thing Old Geng Tou wants to say is a person's name. This person's name is 'Awei'!"
Everyone was shocked. Director Zheng asked in astonishment: "Do you know lip reading?"
"Yeah", Su Yan nodded: "I was fine in school before. I learned from others and I know a little bit!"
When Director Zheng and others heard this, they were all surprised. They all knew that this lip language was extremely difficult to learn, and even if they could learn it, there would be few opportunities to put it to use.
So very few people take the initiative to learn this.
They never expected that Su Yan could understand lip reading.
"Officer Su, are you really sure that what the old man said was the word 'Awei'?" Director Zheng was still a little worried and confirmed again.
Su Yan said: "I'm not wrong. His pronunciation is definitely the pronunciation of the word "Awei", but it cannot be ruled out that it is a homophone."
Director Zheng couldn't help but nodded when he saw Su Yan's assurance. Although he and Su Yan had just met today, they knew that this young man was extremely capable and had a steady and restrained acting style.
Since he said that, it must be right!
"Ah Wei? Old Geng Tou obviously wanted to tell us who the murderer was before he died. Could it be that the name of the murderer who killed Old Geng Tou was 'A Wei'?"
Xu Cheng pondered.
Su Yan nodded: "So I asked a few security guards to get the roster of workers in the factory and compare them one by one. Maybe I can gain something!"
Everyone nodded.
While waiting for the security guard to get the roster, forensic doctors and criminal investigation technicians started their own work, hoping to find any clues about the murderer through on-site investigation.
