The helper is still in the hospital, and this idea has appeared in Yan Yu's consideration more than once.

And with the continuous investigation, all kinds of signs seem to support Yan Yu's speculation, the problem is that there are not many people in the hospital, how to investigate?

The arrival of Yan Yu and the others must have aroused the vigilance of the helpers, and he will hide deeper, in this case, he still has not chosen to escape, or whether he has escaped or not, these are all questions that should be considered.

If he didn't escape, it means that his identity is well hidden, and he is reluctant to give up this cover, and he still wants to continue to use it in the future.

And if he has fled, then it should be easy to confirm.

But this is like Schrödinger's cat, if you don't investigate, you don't know if the murderer is still there, once the investigation is carried out, the murderer will inevitably escape, or the dog jumps over the wall and commits murder again!

Yan Yu was still thinking, Yu Guofeng had already found it, and said to Yan Yu: "The fingerprints have been extracted from the cab by the technical department!" ”

He was a little excited, and continued: "There are two fingerprints, and after preliminary comparison, one of them belongs to Meng Hongming, which is enough to prove that the car is indeed the murderer's vehicle!" ”

"As for the other one, we need to collect samples in the hospital to compare and investigate...... It's just a bit difficult......"

"You want to lock down the hospital?" Yan Yu naturally understood what Yu Guofeng meant.

In order to do such a comparative investigation, all employees of the hospital must be fingerprinted, which will inevitably arouse the vigilance of accomplices.

Only by locking down the hospital can that accomplice be locked up in the hospital completely!

But the current situation in the hospital is very urgent and very complicated, and there are so many people who are hospitalized and hospitalized because of the mudslide that the lockdown of the hospital will cause chaos.

In addition, there is a steady stream of wounded people from all over the country, and it takes manpower to control and contain the entrances and exits, to maintain order, to take samples, and to investigate, all of which require manpower.

Yu Guofeng can't borrow the human resources of the upper level, relying on these people around him alone, even if he summons all the people in the base, it is estimated that it will not be enough.

What's more, the base also needs to leave some guards, after all, there are other people hiding in the base to prevent the murderer from committing crimes against them.

Yan Yu pondered for a moment, then asked towards Yu Guofeng, "There are no other traces in the cab?" Like blood stains or something? ”

Yu Guofeng shook his head: "It shouldn't be ...... It is said that the murderer and the helper should go together, because with the strength of one person, I am afraid that there is no way to do it, but the three people only leave two fingerprints......"

Yan Yu also felt a little puzzled: "It is very likely that this was deliberately left by the murderer, in order to mislead us ......"

"How can you be sure?"

"This helper should be of great value to the murderer, he still has six targets to kill, and he should protect the helper at this time......"

"The murderer never left any traces, let alone fingerprints, so it is impossible not to even take this into account, he will inevitably tell the helper to take measures and not leave fingerprints easily......"

Yan Yu's speculation is very reasonable, but after all, it is only speculation, there is no evidence to support it, and such a conclusion cannot be used, and the testing and investigation that should be done still need to be done.

Yan Yu speculated on the development of the matter from the psychological level of the murderer, but a lot of work was still done by technical investigators and criminal investigators, which can be regarded as a process of mutual corroboration and mutual cooperation.

According to his own reasoning, the fingerprint will not be a helper, that is, the helper should not have left more information.

"Let's wait for the physical and chemical results......"

Yan Yu walked out of the morgue, went to the operating room again, and guarded Dean Qi for a while, and Jiang Huijie found him.

"The test results came out, Meng Hongming did not have abnormal drug ingredients in his body, and there were no other blows or traumas, he was electrocuted......

"No drugs, no blows or traumas?" Yan Yu touched his chin and thought for a while, and then asked Jiang Huijie: "What about the defense injury?" ”

In his opinion, if Meng Hongming was held hostage to the power distribution station under normal conditions, it was impossible for him to have no resistance in the process, as long as there was resistance, he should have left defensive injuries.

However, Jiang Huijie shook her head: "The preliminary results of the body surface examination have also come out, and there are no obvious defensive injuries, and even the traces of binding are left after death......

"That is, he did not resist? This means that the murderer may have threatened or coaxed with words, or was the murderer an acquaintance with Meng Hongming? ”

Faced with Yan Yu's speculation, Jiang Huijie also shook her head: "Even if you didn't resist before, it's impossible not to resist when you are pushed onto the transformer, right?" ”

Yan Yu's eyes suddenly lit up: "Has Meng Hongming's nail cracks been sampled?" ”

Jiang Huijie didn't hesitate too much: "Yes, I took a sample, but I am still queuing, and I don't have enough time to analyze ......"

"Test this first, I'll wait for the result with you!"

Seeing that Yan Yu was so attentive, Jiang Huijie didn't say much, the two went to Yu Guofeng to say something, and then rushed back to the laboratory.

Although Yan Yu was a little tired, he still waited on the sofa, not daring to fall asleep, the sound of the centrifuge was a little loud, tugging at his heartstrings.

After another hour, Jiang Huijie said excitedly: "Found it!" ”

Yan Yu hurriedly jumped up from the sofa: "What did you find?" ”

"It's dander and blood!" Jiang Huijie continued excitedly: "It should be when Meng Hongming resisted and scratched the murderer!" ”

"We must tell Team Yu right away and find out the people with scratches!"

Yan Yu stopped her: "No, this will scare away the helper's ......"

"That'...... So what to do......"

Yan Yu thought about it for a while: "Can you identify the blood type?" ”

"Blood type?" Jiang Huijie shook her head: "It's too little, it may not be possible, if it doesn't succeed, this sample will be ruined......"

"Try it, if you can't do it, and there is no practical value in keeping it, isn't this on-site evidence just to find more information......

After listening to Yan Yu's words, Jiang Huijie's worries were not dispelled: "I must ask for the opinion of the team......

Yan Yu insisted: "There is not enough time, you are the leader of the technical department, you have the right to be the master, of course, this requires your objective judgment, not because of our personal ...... personal feelings that affect your judgment......"

Jiang Huijie was already a capable person, vigorous and resolute, but after meeting Yan Yu, she became a little "weaker", and at this time she also regained her confidence and asked Yan Yu.

"On what basis is this? Or do you have any strong support? ”

Yan Yu did not hide it: "Fingerprint screening is not realistic, because sampling will arouse the vigilance of accomplices and will startle snakes." ”

"But the blood type is different, if we can know the blood type, we can do a preliminary investigation, draw a general range of suspects, and even be able to preliminarily screen out a list!"

"Comparing blood types also requires sampling, which will also startle snakes, and even more troublesome than collecting fingerprints......

Yan Yu shook his head: "No, the city doctor will definitely archive the personal information of the insiders, there will be blood type on it, even if there is no personal information, the city doctor should also keep the physical examination report of the employee, as long as this is found, it will be able to conduct comparative screening!" ”

Jiang Huijie's eyes also lit up, and she was about to turn around to do a blood group test, but she stopped again, turned her head and asked, "Then what?" ”

Yan Yu thought about it, and the words came to his lips, but he still held back, and just said: "Let's talk about it, with the preliminary screening results, we will have a clue." ”

Jiang Huijie didn't ask any more, and Ma Li went to do a blood group test.

In fact, Yan Yu has his own plan in his heart, he doesn't believe Jiang Huijie, but he is afraid that the laboratory wall has ears.

This accomplice should have excellent, even superb surgical skills, and there should not be too many such people in the city.

There are only four common blood types, and the initial screening list should be very long, but with surgical skills, it must be doctors, and the skills are outstanding, this screening condition can greatly shorten the list, and even concentrate it into single digits!

After finding these people, it is enough to find an excuse and verify the defensive injuries on their bodies!

It's not that hard to verify this.

Yan Yu had already let the director of surgery spread the news that Dean Qi was already sepsis, and at this time, as long as Dean Qi had developed purulent sepsis, and caused complications, emergency surgery, these suspects could be included in the operation list.

If you want to enter the operating room, you must disinfect, whether it is washing your hands or changing clothes, there is a chance to check if they have scratches on their bodies!

And the operating room is relatively closed, once this person is found, he must be unable to escape!

However, all of this is currently just Yan Yu's plan, and there are some elements of assumption, and there are still a lot of variables in the process.

For example, if the accomplice pays close attention to Dean Qi's situation, he will find that sepsis may not be true, and when the time comes, the accomplice will be vigilant if he has to perform surgery.

Moreover, if he wants to abscond in fear of crime, it is equivalent to exposing himself, although it increases the difficulty of arrest, but at least the identity can be determined.

Of course, if Meng Hongming scratched not an accomplice, but a murderer, and the murderer was not in the hospital at all, nor was he a person from the hospital, then this effort would also be in vain.

It's just that in any case, in the current predicament, this is a solution worth trying.

Now it depends on whether Jiang Huijie can identify the blood type of the accomplice or murderer from a very small number of samples!

In fact, Yan Yu is more inclined to the former possibility, because the murderer is too cautious and is unlikely to leave such a big flaw.

And he is a narcissist, the reason why he is looking for an accomplice is that he doesn't want to do it himself, so it should be an accomplice, so Meng Hongming's scratch is very likely to be an accomplice, not a murderer.

But as I said before, all of Yan Yu's work is only based on the reasoning of the murderer, and it ultimately needs to be supported by scientific analysis results.

When she was apprehensive, Jiang Huijie also exclaimed in surprise: "Yan Yu! It's done! ”

Blood type got!