While the manhunt is in progress

Chapter 215 Rapid Progress

Looking at Jiang Zhao's pensive face, Song He said slowly, "Judging from the difference between the two cases in Yangjiao County and our county, he is trying to figure out how to avoid being discovered after committing the crime."

"And the reason why he took away all the money of the deceased in the electrocution case was because the electric injury could not have been caused by the deceased himself, so it will definitely attract the attention of the police."

"So he felt that he would be wanted by the police anyway, so he might as well expand his harvest as much as possible."

Jiang Zhao was not very used to Song He's method of conjecture, but he did not refute it. Instead, he asked, "Consultant Song, what if he committed the crime again and was not found? How can we find out the case he did?"

Song He said: "Sudden deaths happen every year. If there are no obvious characteristics of murder cases, the police will not file a case."

"And with the level of forensic medicine and criminal investigation methods back then, coupled with the psychological resistance of the family members of the deceased to the autopsy, it will not be possible to find out the real cause of death of the deceased, let alone track down the murderer."

"But if nothing can be found from the deceased, it doesn't mean that it can't be found from other places."

Song He said while counting his fingers and said: "First of all, the first choice for him to commit crimes is still the hotel. Because the general environment at that time allowed strangers to share rooms, and the information between cities was not developed. No one in another town would know."

"Secondly, he has his own criteria for screening targets. It is necessary for the target to carry a lot of money, otherwise he may not only not get enough, but the probability of being detected by the police will increase if he takes too much."

"At the same time, what can help us screen the location of the next case is his psychological safety distance, that is, after committing a case, where will he flee to before he can feel at ease to commit another crime."

"We tentatively assume that he is from Xiucheng, and judging from the main railway line, there is a city between Xiucheng and Kaesong, and there is also a city between Kaesong and Gucheng, so the next case will most likely be in..."

Jiang Zhao instantly replied: "Kangcheng or Licheng!"

"Team Jiang, don't worry, I haven't finished yet." Song He smiled and said, "A serial murderer will inevitably make some mistakes in the previous cases."

"So he will modify some error-prone methods, improve his modus operandi, and finally form his own unique personal modus operandi."

"For example, the footsteps and the crime time of the case in Yangjiao County have become the quiet cloth shoes and crimes committed at two o'clock in the morning in our county."

"Therefore, as long as we sum up the characteristics of the crime, we will definitely be able to find clues..."

"Consultant Song, wait!" Seeing that Song He was still going to talk, Jiang Zhao quickly interrupted, "How about entrusting the task of summarizing the characteristics of the crime to my police officers?"

Song He saw Jiang Zhao's thoughts, and readily agreed: "That's great, it just so happens that my mind is a little tired, and I may make mistakes if I continue to analyze it."

After finishing speaking, Song He sat back in his seat, let out a long breath, and made a look of relaxing.

Jiang Zhao is a discerning person, so he naturally saw that Song He was an adult, so he nodded sympathetically, and began to arrange for his police officers to discuss the characteristics of the suspect.

Ten minutes later, Jiang Zhao's police officers summed up the characteristics of the crime, but after handing over the summary to Jiang Zhao, all the police officers looked at Song He, waiting for evaluation.

Song He and Jiang Zhao looked at each other, they didn't know what these police officers were thinking, they couldn't help but smiled at each other.

Jiang Zhao was also unambiguous, and stood on the podium to announce the summary to the public. Seeing Song He nodded, he wanted to assign police officers to investigate in other places again.

"Captain Jiang, wait!"

Song He quickly stopped him and said, "Kangcheng and Licheng add up to [-] counties. If the investigation is over, I don't know when it will be. How about leaving this part of the work to us?"

The police officers who were waiting for the captain to call their names were suddenly stunned. They thought that even a criminal police team was not enough. How could the four of you investigate faster than a team of people?

Jiang Zhao was also curious about how Song He could investigate, and also thought that he really needed to leave some manpower to deal with the turnover, so he nodded and said: "It would be great if Consultant Song is willing to help, but how are you going to investigate?"

"Team Jiang just wait." Song He smiled mysteriously, looked at Ma Xuexian and said, "Xuexian, let's activate the skills."

Skill?
What skills?
Ma Xue, who was about to contact his comrades in arms, was stunned when he heard the words, then stood up bravely and bowed to Jiang Zhao, and walked out of the office with his mobile phone under a dozen or so pairs of searching eyes.

Half an hour later, Ma Xuexian returned to the meeting room, and said in a loud voice according to Song He's instructions: "There will be news tonight. I will ask my informants to collect information on hotels 30 years ago, and then check whether these hotels were dead or not." Extraordinary."

"If there is, they will check the information of the deceased by the way, but the detailed information may not be delivered until tomorrow morning."

Ma Xuexian had just received a hint from Song He, asking him to contact his comrades in Kangcheng and Licheng to assist in the investigation.

However, Jiang Zhao and others didn't know the inside story, so they couldn't help but look at Ma Xuexian with admiration for having informants in Cannes and Licheng.

And there are also quick-witted ones, who quickly remembered that Song He once said that he had investigated Kaesong privately, and Changxing Chemical Fertilizer Factory was found out through private investigation, if this was also found out by Ma Xuexian's informant...

Almost instantly, Ma Xuexian's image in the minds of Tang County police officers became mysterious, a bit like a spy chief.

Liu Linjun, who had been listening in, saw that the atmosphere was a bit cold, and smiled: "Sure enough, it is not easy for people to join the assistance team. Officer Ma also has unique skills. I just don't know what kind of work Officer Wu is responsible for?"

"Liu Bureau, please take it easy, don't praise them badly." Zhou Kai praised Liu Linjun's position jokingly, and said: "Officer Wu Xuerui is responsible for obtaining and screening information in various systems, including the banking system, communication system, etc. system, medical system, and various official systems.”

Liu Linjun also had a good impression of Zhou Kai, who also came from the armed police, and asked with interest: "Is there any trick to specifically retrieve and screen the information in these systems? Can you tell me about it?"

"It's not inconvenient." Faced with this exchange of investigative techniques, Zhou Kai naturally would not refuse, so he nodded at Wu Xuerui.

Wu Xuerui said generously: "Our police system is now connected to many systems. For example, the case discussed today happened last month. The hotel's identity registration system alone can help us locate the murderer."

"The traffic monitoring system can help us find the whereabouts of the suspect, and the ticket purchase records of the passenger transport system..."

Wu Xuerui described the application of various system information in case detection from the shallower to the deeper, and unknowingly helped Liu Linjun and Jiang Zhao establish and strengthen their determination to build a local surveillance system.

When dusk fell, the team that went to Xiucheng to investigate finally sent news that they had arrived in Xiucheng, and they were also preparing to start an overnight investigation.

Liu Linjun estimated the time and felt that it would be difficult to make any new progress in the investigation that day, so he announced the end of the discussion and arranged for Dong Xiao to accompany Song He and others around the county.

However, when Song He and others left, he suddenly felt a little confused: this case that had been pending for 30 years had made such great progress in one day!

(End of this chapter)