Serious Crime Unit 1

Chapter 755 Traps (16)
"Yes, the situation is like this: the 122 police center received an alarm call at 2018:2 on February 15, 23, saying that a traffic accident occurred at the intersection of Jixiang Road and Daming Road, and asked the command center to send people to investigate immediately. , I was on duty, so I took Xie Xiaobo and Zhao Jun with me.

"After we arrived at the scene, we saw a Dongfeng truck with a load of 5 tons parked in the middle of the road. There was a lot of construction waste on the truck. The front of a BMW 520 hit the bottom of the truck. The license plate number was: Chang AB15462. The BMW had been flattened, the driver's head was cracked, and the cab was filled with blood and white brains.

"After inspection, the owner had no heartbeat or pulse and had been dead for a while. The driver of the truck was the caller, named Jiang Yujie, from Qianlang Town, Jiangbei District. He said that a BMW hit his car. Because the BMW was traveling very fast, he was hit by it before he could react.

“When we examined the deceased, we smelled a strong smell of alcohol, so we used a syringe to extract 10 ml of his blood flowing in the cab, and prepared it for testing. First, to see if he was driving drunk or drunk; It was because they were worried that he would be murdered. Even if the family cremated the body, there would still be blood samples to prove it.

"We found the deceased's wallet and ID card in the inner pocket of his suit, and found out that his name was Huma. We also found his parents through his household registration and contacted them in time because they were both working in Ho Chi Minh City. Business, they didn’t believe it at first. We sent them photos of the scene and Huma’s, and then they believed it and agreed to book a flight to return to China immediately... That’s probably what happened.” Lu Nanshan narrated slowly, with a heavy heart. .

"Are there skid marks on the road?"

"The Dongfeng truck has no braking marks, and the BMW 520 has very obvious braking marks. The braking mark is 13.5 meters long, but such a short braking distance cannot stop a car with a speed of 120 kilometers per hour."

"The speed is 120 kilometers per hour? The maximum speed limit in the urban area is 50 kilometers per hour. Why does Huma dare to drive so fast?" Jiang Yiming was puzzled.

"Huma must have been drunk or drugged, otherwise he would not have been able to drive so fast."

"Has the BMW's airbag deployed?"

"It was turned on, but it didn't work because the car was going too fast."

"Isn't there a traffic light at the intersection? Didn't he see it? Could it be that Jiang Yujie ran the red light and Huma crashed into the truck?"

"We reviewed the surveillance video from the time of the incident. The video showed that it was not Jiang Yujie's fault, but that Hu Ma was driving too fast. Of course, this is not the main reason. The main reason is that someone hacked into the traffic light system and changed the original red light. Changed the light to green..."

"What? How could this happen? Isn't the firewall level of your signal light system very high?" Jiang Yiming was shocked, which meant that Huma was murdered.

"The level is very high, but the hackers' methods are even higher. Our key was designed by Alibaba Networks. I heard that only hackers above level [-] can intrude. There have only been two such intrusions in our city. That one Although there was a traffic accident, no one was injured or injured, only one person died in this accident.”

Jiang Yiming knew that the original CEO of Alibaba Internet Company was named Tang Yuan. Zuo Li went to his company as an undercover agent and eventually died under his gun. However, Tang Yuan had been executed for nearly 8 years and it was impossible for him to come back from the dead. To commit a crime.

"So if Huma hadn't been drunk and driven so fast, then he wouldn't have had an accident?"

"Yes, if he had controlled his speed within 50 kilometers per hour, even if he saw Dongfeng getting on the car, he would have had time to brake. Because the BMW's braking system is very superior and protected by airbags, Huma would not have died at all. He was the one who killed himself. Send him to Huangquan Road."

"But if hackers had not invaded the traffic light regulation and control platform and commanded the traffic lights at will, it would have been impossible for Jiang Yujie or Hu Ma to run the red light. This is a carefully planned murder case. Team Lu, we ask you to give us all the investigation data for review. , including surveillance video from the accident scene.”

"Okay, I'll get the file right now." Lu Nanshan stood up and walked out. Jiang Yiming picked up the tea cup and smelled the tea, then took a sip of tea.After a while, Lu Nanshan handed all the information into Jiang Yiming's hands.After Jiang Yiming took it over, he said goodbye to him.He and Zhou Ting returned to the team and handed over the surveillance video of the intersection of Jixiang Road and Daming Road to Lu Yingying and Wen Xiaorou. He and Zhou Ting went to check the records of the investigation site.

After watching the surveillance video, Wen Xiaorou came to Jiang Yiming's office and saw that he was obsessed with reviewing Hu Ma's case files. Without looking up at her, she said: "Captain Jiang, you are so annoying. You ignore my existence. I want to protest……"

"I've already invited you in, how could I ignore your presence? Tell me, what did you find?" Jiang Yiming still didn't look up at her. He did it on purpose, wanting to polish off her squeamishness.

"The traffic lights at the intersection of Jixiang Road and Daming Road were indeed tampered with. Huma's car was driving from north to south on Jixiang Road, and Jiang Yujie's car was driving from west to east on Daming Road. It is suspected that People only tampered with the red light on Jixiang Road and changed the red light into a green light, which caused Hu Ma to drive past quickly and cause a car accident." Wen Xiaorou sat opposite Jiang Yiming and looked at him quietly.

"Isn't this hacker so powerful? He can actually tamper with traffic lights."

"Team Jiang, it is not necessarily a hacker. To change traffic lights, you can use an infrared transmitter. The transmitters of the Public Security Bureau and the fire brigade have registered codes. Transmitters without codes are illegal. Records from the Transportation Bureau show: February At 2:15:23 on the 41th, an uncoded infrared transmitter emitted a signal that changed the traffic light, causing the drunk Huma to crash into Jiang Yujie’s truck.”

"Oh, is there another way?" Jiang Yiming raised his head and looked at her.

"Yes, I have gone to the transportation bureau to check, and the system recorded the situation at that time. Computers cannot lie." She was secretly happy because Jiang Yiming finally looked up at her.

"So, how did the killer get the infrared transmitter?"

"They are sold online, and you can also modify them yourself. Of course, this requires a certain amount of electronic knowledge."

The infrared transmitter is a remote control device with remote control function.It emits light outward within a certain range through an infrared emission tube to control signals. It is widely used in infrared receivers, data transmission technology and other fields such as consumer electronics, industry and communications.

"A certain amount of electronic knowledge? The threshold is so low? Then isn't the range of suspects very large?"

"Of course, it is most likely to be bought online or customized by an electronics company. However, the suspect should have operated it near the scene. First, because the transmitter is effective within a certain range; second, the suspect has to calculate the Huma carefully. and Jiang Yujie’s speed, and must be accurate to within 1 second, otherwise the two cars will pass by each other. Therefore, the suspect must observe near the scene. Of course, if Huma does not hit the truck, but hits another car The probability is also very high because there are cars behind the truck."

"Where do you think the suspect would be standing observing the two vehicles?"

"If you don't want to be photographed by the surveillance camera, then you must hide in the blind spot of the surveillance scene, but you also need to see the two cars. If it were me, my first choice would be on a high building next to the intersection. You can also choose Hide in a nearby house."

"But the scene is surrounded by high-rise buildings. The tallest building has 21 floors and the lowest building has 8 floors. So, there are at least a thousand rooms. How can we find the suspect? What's more, the suspect may erase the traces. "

"It is difficult to find the suspect who used the generator to tamper with the traffic light, and time does not allow. The best way is to find the person who drank with Huma that night. Huma knew that he was going to drive, and it was definitely impossible for him to get drunk. He should It was the suspect’s accomplice who got Huma drunk and then asked him to drive home.”

(End of this chapter)