Chapter 935

Pop!

Su Shanming lit a cigarette, in the absence of secondhand smoke.

He was an old hand who had joined the special task force 10 years ago. The several criminal police officers present might not be able to solve this case, but one look at their colleague's appearance, and they knew which butt he was raising when he went to poop today.

Pop.

Lang Heng also lit a cigarette, using the Zhonghua that Liu Jinghui had saved and placed on the table.

Pop pop!

In the 4303 conference room, smoke once again occupied the mainstream, forcing the ventilation fan to hum and turn, blowing the withered grass outside to sway in bursts. How could ordinary flowers and plants withstand such devastation from nicotine? They would have died long ago.

Su Shanming took another sip of tea before saying: "I was the one who investigated the daughter's line back then."

This is also a very normal route. Ten years ago, it was already required that murder cases must be solved, and the requirements were even higher than they are now. The resources invested by the police, especially human resources, were extremely sufficient. Two people died, and there must have been police officers following up on the interpersonal relationships of the other person.

Su Shanming puffed twice more and continued: "The little girl attended our city's No. 3 Middle School; she should have been in the second year of junior high at the time. When I investigated, I first asked the school teachers, then asked some classmates, and then it was the father who was asked with the help of our colleagues. I can't remember the specific content of what was said back then. In our current words, the little girl should have had a romantic interest."

"In the second year of junior high, having one or two crushes is very normal." Huang Qiangmin was more about relieving the mood.

Seeing that the political commissar had also entered the trenches, Mu Zhiyang immediately offered himself up: "When I was in junior high, all the girls in the class were the objects of my secret crush."

"En... the little girl's romantic interest, actually, it couldn't be called ambiguous; it was just that they made phone calls in private and had mutual affection. He was a classmate from the next class, looked relatively tall, and compared to junior high students, he was thin and tall. In the second year of junior high, he was over 1.75 meters tall, had studied dance, and was relatively good at talking. His parents were high-level intellectuals." Su Shanming briefly stated the situation and then said: "I had also investigated it carefully at the time. Personally, I feel that this classmate should not have had the ability, nor would he have committed such a vicious case, and there was no need."

"Did he have the ability to strangle an adult female? Like Sui Yingxue?" Jiang Yuan said this because Sui Yingxue had two children, her daily activity level was not small, her physique was slightly plump, and she weighed over 110 jin. Although she still couldn't compete with male strength, she still had a little power to resist when facing a teenager.

Su Shanming recalled for a moment, shook his head, and said: "That boy was a very thin boy. Even if he could strangle an adult female, it wouldn't have been suppressive."

"Then at least it would have required two people." Jiang Yuan looked at Liu Jinghui.

Liu Jinghui nodded: "The deterrent power of teenagers is not enough. Even if they held a knife, if they wanted to control Sui Yingxue and her daughter, they would still need pure martial force. It's impossible to just threaten them with a knife and make the other party submit."

Su Shanming took another puff of his cigarette and said: "After I understood the situation of the little girl's romantic interest at the time, I wrote a note in the investigation file, and didn't write anything else later. The social atmosphere back then was relatively conservative, so I thought..."

"Since it's a clue that was excluded, mentioning it once is enough." Lang Heng waved his hand and didn't let Su Shanming explain further. He turned to ask Liu Jinghui: "Should we continue to investigate this line? There is another problem here: if it were the little girl's boyfriend, or secret crush, or pursuer, would it go as far as murder? At least it's not very likely to go as far as murder silently. Furthermore, the mother hid the son. If there was a problem with the interpersonal relationship on the little girl's side, either she wouldn't hide him, or she would hide both."

"This is indeed one of the considerations." Liu Jinghui frowned while speaking, but the corners of his mouth couldn't stop being a little happy.

This case is the kind of case that truly needs reasoning!

Two killers, multiple investigation directions, each direction has hope, but it also seems to have entered a dead end... It is precisely the kind of case that needs to be analyzed in detail using logical reasoning.

"On the little girl's side, I think it's necessary to re-confirm." Liu Jinghui restrained his expression and said: "Of course, I'm not saying that this direction has major suspicious points, but I believe that the investigation in this direction back then was still not sufficient. Of course, of course, this was also limited by the environment at the time. There is a gap between the world of teenagers and the world of adults. Even with police questioning, some teenagers, for various reasons, might not have spoken very clearly..."

After Liu Jinghui emphasized this, he added: "Now that 10 years have passed, the 14-year-old child back then is 24 years old this year. I think this is actually a good opportunity. Things that felt incredibly difficult in junior high, even if they were very shameful or very fearful things, should no longer be a problem when recalled now. Asking them again might yield results?"

This time, even Su Shanming couldn't help but nod: "Indeed, questions that might have been difficult to speak about back then should be able to be said now. I will continue to follow up on this part."

Liu Jinghui looked at Lang Heng. He was still in the role of a provincial expert and didn't need to command the people of Changle City.

Lang Heng nodded and said: "Okay, Shanming, you continue to follow up."

Reasoning must also be based on evidence. Liu Jinghui's constant pushing of the investigation direction also requires other criminal police officers to help implement it.

After discussing this line, Liu Jinghui felt slightly encouraged, and then followed his train of thought, saying: "From a human perspective, the victim's husband, who was the previous first suspect, I see that you have also checked his network of relationships."

"That's for sure." Lang Heng nodded slightly.

"However, you must have had very limited trust in this suspect back then. I think it's necessary to take out his confession again and investigate it in depth." The direction Liu Jinghui proposed this time was still a major one, meaning another 20 police officers would have to spend about a week on long shifts.

"Okay." Lang Heng agreed immediately.

"Captain Jiang, what about you?" Liu Jinghui looked at Jiang Yuan.

"I don't have a complete train of thought right now either." Jiang Yuan answered, then looked at Liu Jinghui and said: "If I have to say, I suggest doing trace evidence analysis; do more of it and take more samples."

"Do... how much?" Lang Heng gritted his teeth.

"Do it for all the collected physical evidence. I will mark some more evidence, and we can take samples from multiple points later." Jiang Yuan replied.

Anyway, if you don't have a train of thought, just cast a wide net. This is actually Liu Jinghui's strategy. From the provincial bureau to the local level, he has worked on countless cases, big and small. Many major and important cases are actually solved using this shameless method.

Jiang Yuan followed suit, and in an instant, he went from having no train of thought to having no train of thought.

Compared to DNA, trace evidence targets substances other than the human body, but its performance and sensitivity are on par with DNA.

"Do all of them? The cost of doing one trace evidence analysis now is at least 500 yuan. If we do all the remaining physical evidence from the 430 case, wouldn't that be thousands or tens of thousands of items?"

"Then let's start with the marked evidence and slowly expand later." Jiang Yuan expressed his understanding very reasonably. Doing trace evidence analysis is inherently slow, and it was always going to be done in batches anyway.

"I will try to do more." Lang Heng could guess Jiang Yuan's thoughts and just pretended not to know. Although he was the one paying, he had to admit that the plans proposed by Liu Jinghui and Jiang Yuan were both very practical.

Whether it was Liu Jinghui's train of thought or the trace evidence analysis plan proposed by Jiang Yuan, both broke through the shackles of the previous two special task forces. It must be said that this is the most promising direction for investigation.