() At four o'clock, except for the forensic department and the trace examination department, which still did not give up and stayed at the scene to collect evidence, most of the remaining police forces that could be dispatched were spilled out, trying to determine the location of the suspect as soon as possible.

If Cao Mingyang is still alive, find a way to rescue him.

Su Ping, Xun Mu and others returned to the detachment to make a detailed analysis of the evidence and videos found so far.

"Team Su," Qi Yuan came to Su Ping's office with a report, and said: "There is a new discovery on the technical team's side - the model of the remote-controlled helicopter carrying the USB flash drive, it has been changed by someone, the chip in it has been replaced, the performance is still very strong, and the ...... is used."

Speaking of this, he paused, looked down at the report, and then continued: "The SRRC standard is used - of course, it has not obtained qualified certification, only the technology widely used by the certified manufacturers of the standard is applied, and the power has been increased, and the remote control distance is as much as 20 kilometers if it is used purely for remote control." ”

"What? Twenty kilometers? Su Ping's eyes widened, and he was a little surprised: "The radius of the urban area of Yuqiao is only about thirteen or fourteen kilometers, and the remote control radius of this thing can be twenty kilometers?" How do you check this? ”

"Ahem, it's not really that large." Qi Yuan scratched his head and hurriedly added: "The limitation of long-distance radio transmission is very large, it is one thing to be able to transmit twenty kilometers, and it is another thing to want to control it finely.

According to the research of the technical team, if you want to achieve fine operation, let the helicopter model stay at the door of the police office steadily, with the chip performance of the helicopter, four thousand meters is the limit. ”

"Can you stop panting when you talk in the future?" Su Ping rolled his eyes, and then said, "But ...... Four thousand meters, this range is not small, with this as the radius, the total area that needs to be investigated is also about fifty square kilometers, not to mention that the police force is tight now, even when it is the most relaxed, it is difficult to ......"

"Maybe the range could be a little smaller." Xun Mu took over the words and said softly: "The transmission distance is one thing, and the control is another. There are no cameras installed on the helicopter, so if you want to operate accurately, you have to keep your eyes on it, right? Where can the suspect go farthest? ”

"Not necessarily." Su Ping shook his head and said, "Don't forget that they have accomplices. One person takes his mobile phone and hides in the dark to open a video message to the door of the police office, and the other person can stare at the mobile phone to control it, which is not much different from playing with a drone with a camera. ”

Xun Mu blinked his eyes, his face was strange: "Old Su, something is wrong with you, why did your head suddenly become so flexible?" In the past, you were smart and smart, but you mainly relied on experience, and your thinking was not divergent, and this kind of operation was not good at it. ”

"I learned from Xiao Qi." Su Ping shrugged his shoulders and didn't talk to him, only said: "My body is not good, I can only rely more on my brain, of course, I have to think about it and study it well." ”

Qi Yuan opened his mouth.

Then Xun Mu said: "If they really follow your routine, let's carry out a detailed search outside the police office, I'm afraid it doesn't make much sense, after all, who goes out these years doesn't have a mobile phone in his pocket."

So far, there has been no substantial progress there, which probably means that this stupid solution will not work. So you say, what should we do next? ”

"I don't know." Su Ping sighed and said, "There are too few clues left for us in this case, and the murderer is quite smart." Fortunately, we are not without suspicions, and the families of Wu Yichen and others are the key targets of suspicion. By the way, the families of those girls, nothing is wrong, right? ”

"I asked, it's fine." Xun Mu shook his head, and then said, "As for the victim's family......"

Qi Yuan took out the second report and hurriedly said: "At present, it can be determined that the families of Wu Yichen and Lai Guoyang are in Yuqiao, but Lai Guoyang's family members have long been quarantined because they have been in contact with infected people who have returned to Yuqiao from Jiangcheng and are not qualified to commit crimes.

Pan Zhouli was an orphan, his parents and sister died in a fire caused by a gas explosion five years ago, when Pan Zhouli was still in high school, lived in the school, escaped the disaster, and soon after he dropped out of school. ”

Xun Mu was a little surprised: "You have run through all the departments?" ”

"Team Su told me to run," Qi Yuan replied, "Tell me to ask in various departments and summarize the report." ”

Su Ping snorted and took over: "So the biggest suspect at present is Wu Yichen's family." ”

"Team Su, there's one thing I don't understand." Qi Yuan answered and asked: "Cao Mingyang is still not sure, Chu Xunliang has a police officer, right?" Police is not a built-in GPS positioning ......"

"In the trash."

"Huh?"

"After receiving Fang Chang's notice and confirming that Chu Xunliang is also missing, we will immediately look for his police officer." Xun Mu took over and said:

"I quickly found it in the trash, in addition to that, there were also his and Cao Mingyang's mobile phones, ID cards, etc., as well as police uniforms - didn't you notice that they were not wearing clothes in the video?

The murderer is more cautious than you think, and everything Cao Mingyang and the others are carrying have been cleaned by Bala. ”

Qi Yuan was a little surprised: "How can these guys have such a strong sense of anti-investigation?" Could it be that he is a repeat offender who has criminal experience? ”

"I don't rule it out." Su Ping said softly, then raised his eyebrows again, and asked, "Didn't the report in your hand say whether Wu Yichen's family has a criminal record?" ”

"Uh, I'm afraid you're in a hurry, and before you finished reading it, you only roughly flipped through it......" Qi Yuan hurriedly explained while flipping through the report.

But before he could get to the position, he was snatched away by Su Ping.

Su Ping quickly flipped through it and quickly found the relevant description, saying: "Wu Yichen's father, Wu Guihong, was once imprisoned for picking quarrels and provoking troubles and intentionally causing harm and was sentenced to five years in prison. ”

"Sure enough, ......" Xun Mu said softly: "There are many fish and dragons in prison, if you have the heart, you can even learn a lot of side skills, as well as a lot of anti-investigation techniques."

Even if you don't learn anything, at least the anti-detection awareness can be much stronger. If he is really one of the perpetrators, it is no wonder that the perpetrator has such a strong sense of anti-investigation. ”

"More and more clues point to him." Su Ping nodded slightly, and then asked, "Do you want to contact him?" ”

After a pause, he said, "But if we want to make contact, I'm afraid we can only come to the door." There is no factual basis for not enough summons, judging from the investigation report, he is indeed quite hostile to our police, he has been imprisoned, and he is also an old fritter, it is estimated that he will not come, so we can only go to him. ”

"Go ahead." Xun Mu said: "But...... It is likely that we will be closed, and even if we come to the door, he will dare us to go. ”

"Gotta try."