Chapter 289: Toner

Wang Bo's running in the sun had already attracted Yu Yu Wenshu's attention.

The sound of rapid running immediately made Comrade Yu Yu Wenshu realize that the on-site investigation had results.

Yu Yu Wenshu was originally organizing personnel below, trying to find clues along the cashier's interpersonal relationships—in case he beat someone else's child, pushed someone else's elderly person, or stole someone else's takeout, causing the murderer's ferocity, then the case wouldn't be solved directly.

However, Yu Yu Wenshu still preferred robbery and murder, so, noticing that Jiang Yuan had a breakthrough, Yu Yu Wenshu immediately put down other things and came to the scene again.

He He Guohua was holding the on-site investigation lamp, changing wavelengths, looking for the window frame there.

Yu Yu Wenshu understood as soon as he saw it, and couldn't help but be a bit excited: "Can you find the murderer's fingerprint?"

"Possibly." Jiang Yuan replied casually.

Yu Yu Wenshu immediately widened his eyes: "Eh, can you find it? Can you be sure?"

"Possibly. Don't know yet, let Xiao Bo take things." Jiang Yuan had no words to return, so he could only say so.

Yu Yu Wenshu "En En" twice, hurriedly suppressed the slightly excited mood."

As the detachment leader of the Criminal Investigation Detachment, he was originally a master of controlling emotions, it was just that this case was a bit grinding.

Don't look at it as a case that happened today, but from the time of the incident to now, Yu Yu Wenshu has not been idle, and the entire Criminal Investigation Brigade has not been idle. When encountering difficulties in robbery and murder cases, it is really difficult.

Watching the case slide down step by step, the anxiety in Yu Yu Wenshu's heart accumulated exponentially.

It was mainly the end of the year, and the results of everyone's hard work for so long, if they were wiped out by this current homicide case, Yu Yu Wenshu, as a leader, felt guilty.

It just so happened that the case in front of him was slippery.

Judging from Yu Yu Wenshu's experience, this case is very consistent with the behavioral characteristics of repeat offenders who commit crimes on the run.

Construction sites are originally places where fish and dragons are mixed. With the current labor market, migrant workers are required to settle wages daily, and there are basically no requirements for things like ID cards. In this environment, it is inevitable that there will be fugitives.

It doesn't even have to be that the fugitive himself has worked at the construction site. As long as he chats with fellow workers, he can know where there is recruitment recently and where payment is to be settled recently. And the place where they chat together may be a temporary dormitory where roommates don't know each other, or it may be eating by the roadside when they meet by chance. In other words, this line is very likely to be unable to check. If this line of the murderer's information source cannot be checked, Yu Yu Wenshu's second idea is to chase the murderer's modus operandi. Yu Yu Wenshu has already arranged this work below.

Relying on a good body and familiarity with the construction site, robbing the construction site of cash, and so on, it can be said that it is very consistent with the modus operandi of a fugitive.

If it is a pattern, it may be adopted many times. It's just that, maybe no one was beaten to death before, and maybe there was no serious injury, and various places handled it as separate cases.

However, Yu Yu Wenshu is very clear that even if his hypothesis can be verified, the subsequent investigation process is still complicated.

The reason why a fugitive is a fugitive is that he has at least successfully fled for a period of time. This kind of criminal who is gradually adapting to the life of a fugitive, determining his identity, arresting, etc., are not easy.

If Jiang Yuan can find fingerprints, then from the perspective of investigation pressure, solving the case becomes chasing and fleeing, at least it will not lose the 300 points of the current case.

On the other hand, chasing and fleeing in this situation is still simpler than solving the case. He was so anxious to find Jiang Yuan, one idea was to block people in Changyang City.

The case happened today, it is very difficult for the murderer to handle more than 100,000 yuan in cash on the same day, and the probability of carrying it out of the city is relatively small.

But after today, he is likely to find suitable transportation, or suitable means of cashing out.

Yu Yu Wenshu was originally looking forward to Jiang Yuan's on-site investigation ability, so he didn't go down this time, just stood above and watched, and asked: "What is the problem with this window?"

"The murderer jumped down from the window." Jiang Yuan observed

while telling Yu Yu Wenshu what he said before.

Yu Yu Wenshu was shocked: "Equivalent to saying, you have already determined the murderer's footprints?"

"Right." Jiang Yuan nodded.

"This is a good thing, that, send the photos of the footprints to me, I will let people find them below immediately, and see the distribution of the murderer's footprints." Yu Yu Wenshu is also a very smart person, and immediately found a way to use footprints.

This time it was Jiang Yuan's turn to pat his head: "I forgot. Team He, send a copy to Branch Chief Yu."

The strategy proposed by Yu Yu Wenshu is very useful.

Now, there are a lot of footprints in the construction site, including the murderer, people entering and leaving the construction site, almost impossible to avoid leaving footprints.

The reason why it cannot be used is that there are too many footprints, and more importantly, I don't know what the murderer's footprints look like.

Now that I know, the trace inspection and on-site investigation of Changyang City can find all the footprints in the construction site and see where he entered the construction site and left the construction site.

Although compared to the scene inside the room, the value of the construction site scene is lower, but if the murderer's route can be determined, the case can still be greatly advanced.

If the murderer has been to the room where the workers play cards, then the possibility of internal crime can be considered. If the murderer's route is single, then the possibility of having made a forward station can be considered...

He He Guohua quickly sent the photos of the footprints taken to Yu Yu Wenshu. Yu Yu Wenshu also immediately lowered his head to operate, and asked: "Can you see anything from the footprints?"

"The murderer is about 30 years old, relatively light weight, probably less than 130 jin, about 1.65 meters tall, male..."

Jiang Yuan had carefully looked at the footprints before, and directly reported the conclusion here.

Yu Yu Wenshu directly repeated Jiang Yuan's judgment to his subordinates. At about the same time, Wang Bo also ran back.

"I dismantled a printer toner cartridge." Wang Bo put half a bottle of printer toner in a bottle, handed it to Jiang Yuan, and asked: "Now?"

"Now is to mix toner and magnetic powder, and then try to brush it out. It is best to use a feather brush." Jiang Yuan gave a detailed plan and said: "When the murderer jumped out of the window, it is very likely that he would support it with his hand. The time is short, the force is great, this kind of fingerprint, it is possible to leak out, actually really want to brush it out, it is not easy."

When Jiang Yuan spoke, He He Guohua nodded again and again. There are too many fingerprints here, no one can collect all fingerprints.

Instead, after pointing out the particularity of the fingerprint, the clues can be connected. The things several people are doing now can reflect value. Ordinary fingerprints, magnetic powder on the battle, will appear directly. This kind of fingerprint is useless.

Jiang Yuan and He He Guohua, like two old scumbags, saw fingerprints that appeared easily, took a photo and gave up.

After Jiang Yuan used magnetic powder and printer toner, used the tip of the feather brush to pick it up, brushed it again and again on the window sill, the fingerprints that shyly revealed their faces were paid special attention to by the two. "I'll compare it first." After taking the fingerprint, Jiang Yuan started to do feature points on the spot.

He He Guohua started to finish.

Yu Yu Wenshu was surging with heart, and didn't dare to disturb Jiang Yuan, and couldn't help but think, if this is a pure robbery and murder case, the sentence will be heavier than ordinary homicide cases, mostly it is the death penalty immediately executed.

Equivalent to saying, if this case is solved and the murderer is caught, life will start counting down directly.

Ningtai Jiang Yuan, Fierce Flames Towering.

Sure enough. ===== CHAPTER 290 =====