Lin Guang was forced to be speechless by Zheng Hanfei, what should I do? He has given up on these amateur detectives, and he will definitely not let them continue to investigate the scene, but he thought wrong, Xue Yu is not a fuel-efficient lamp, Zheng Hanfei is even more, originally he thought that Zheng Hanfei just accidentally identified his identity, Zheng Hanfei also admitted that he reasoned out after reading too many mystery novels, and the fact that the murder case was not solved yesterday is the best evidence, but today, Zheng Hanfei shocked him again, and he even wondered whether to trust them again.

Take a gamble. In the end, Lin Guang could only choose this decision, after all, the conversation between himself and Zheng Hanfei and Xue Yu was very loud, I believe that there are many onlookers who listen to it, if they deny them, and he can't come up with convincing evidence, the people's trust in their police will definitely decline, and the consequences will not be as simple as catching the real culprit.

Although he thought so in his heart, Lin Guang was unforgiving, "Okay, since you say so, I will let you get involved, but we police can't accompany you here, as long as you solve the case today, you will apologize to you and resign." If you can't solve the case today, I'll ask you to go back to the police station on the grounds of obstruction of policing. ”

"I don't agree." Zheng Hanfei and Xue Yu said in unison, and then glanced at each other differently, and couldn't help laughing, and then Xue Yu turned his head to Lin Guang and said: "Superintendent Lin Guang, we are not solving cases for bets, detectives who use murder as bets are not good detectives, I just want to find out the murderer hidden in the dark and give everyone the truth, isn't it, little ghost?" ”

Zheng Hanfei nodded, agreeing with Xue Yu's point of view, although many of the novels and comics he read have scenarios such as reasoning duels, but this is different from betting, although it is a reasoning duel, but all the detectives want to solve the murder case, the truth is revealed to the world, and take the murder case as a bet, so is it still a detective? Is this any different from a murderer who takes human life as a child's play?

"Let's go, little ghost!" Xue Yu greeted Zheng Hanfei and walked into the scene of the crime, Cui Minzhou's body had been removed from the bed by the police and moved to the floor, which made Xue Yu a little troubleless, squatted in front of the corpse, borrowed a pair of gloves from Zheng Hanfei, and began to check the corpse, of course, Xue Yu did not believe in the results of the police search, nor did he want to know the clear clues such as the time of death of the corpse, he wanted to use this murder case as a starting point to find the murder weapon that killed Cui Minzhou, judging from the current situation, Xue Yu and Zheng Hanfei concluded, It is very unlikely that Cui Minzhou will take poison, and the murder weapon is usually a poison needle stained with cyanide.

No! After nearly thirty minutes of inspection, Zheng Hanfei and Xue Yu came to this conclusion at the same time, which made them wonder, it stands to reason that this should not be the case, they must have missed something, just in case, Zheng Hanfei stepped forward to check it, this time the inspection did not disappoint them, they found a small hole in Cui Minzhou's left palm, because the small hole happened to be on a mole, so they missed it.

With such a small scar, the murder weapon is usually a poison needle or something. Next...... After this was done, Zheng Hanfei and Xue Yu stood up one after another, their eyes kept looking at the room full of green, knowing the murder weapon, but there was no shadow of the murder weapon, obviously the murder weapon had been taken away by the murderer, then they had to start working on the mystery of the double secret room, only when this was solved, could they know who the murderer was, and finally find out the evidence and force the murderer to comply.

"It's impossible to use a rope." Zheng Hanfei looked at the keyhole, stood on tiptoe to hold the doorknob, turned it a few times, and came to this conclusion, whether it is in the bedroom or outside the bedroom, if you want to lock the door, you need to use the key, and more importantly, the door is almost close to the floor, and it is impossible to use the most ordinary method.

"yes." Xue Yu sighed in disappointment, "I didn't expect the murderer to use such a simple method, this is very difficult." It seems that the murderer must think that there are too many rope techniques in mystery novels and anime, and everyone knows that once he uses it, he will definitely make others think that the deceased is not a suicide, and doing so will not only undo his efforts, but also expose his identity. ”

"Brother Xue Yu, what do you think?" After thinking about it for a while, Zheng Hanfei couldn't come to any conclusion, seeing that Xue Yu was not as troubled as him, he thought that Xue Yu already had some important clues, so he blinked his eyes and asked like a curious baby.

"Me?" Xue Yu felt a little funny when asked by Zheng Hanfei, shook his head, glanced at the security door that was broken by them, and said lightly, "I only know that this double secret room is impossible to achieve, not to mention what method was used to lock the bedroom door, the security door added to the bedroom and the outside were locked, and the murderer used what method to put the key next to Cui Minzhou, don't forget, the scene we saw at the time was that the keys to these two doors were by Cui Minzhou's side, and those keys were not spare, and they were not easy to imitate." ”

"By the way, Brother Xue Yu, I have a question I don't understand." This difficult point could not be broken, Zheng Hanfei's thinking suddenly fell into the death of many rocks called mysteries, if he wanted to see the truth further, he had to move the rocks away, after thinking for a while, Zheng Hanfei suddenly remembered a thing, and humbly asked Xue Yu, "Didn't you say that liquid cyanide is volatile in the air?" How did the killer get the liquid cyanide on the needle? Could it be that the murderer sneaked in with a bottle and needle filled with liquid cyanide, first stained it and then stabbed Cui Minzhou to death? It won't be so much trouble, right?! ”

"There's something wrong about what you're saying." Xue Yu corrected, "Cyanide is volatile, most detective novels like to use cyanide as a poison, but different cyanides have different physical properties, for example, cyanates are not easy to volatile, and some polymer cyanide-containing organic compounds are not easy to volatile, these knowledge are all chemical, and it is understandable that a little ghost of your age does not understand." ”

"That's right." Hearing that what he didn't understand was just that, Zheng Hanfei suddenly realized, pinched his chin, and didn't know what he was thinking. Seeing Zheng Hanfei thinking so seriously, Xue Yu smiled slightly, and also began to think about him, he didn't want to be compared to a child who was nearly twenty years younger than himself, then he would have no face to be a detective again.

Saying...... Why did the murderer stab the palm of the deceased with a poisonous needle? Squatting in front of Cui Minzhou's corpse again, he looked at the small hole in his left hand again, and his eyes gradually narrowed. Is it just because Cui Minzhou has a mole on the palm of his hand, in order to hide the traces of the murder weapon? No, no, judging from such a small hole, the volume of the poison needle is not too large, no matter what ground it is pierced, it is not easy to see, it seems that the murderer wanted to pierce Cui Minzhou's left palm from the beginning, as for the mole is purely accidental, only think so!

Thinking about all this clearly, a trace of excitement flashed in Xue Yu's eyes, and then he became annoyed again, a problem was solved, and many questions came quickly, why did the murderer use a poisonous needle to pierce Cui Minzhou's left palm? What's the point? A lot of questions almost made Xue Yu's head explode, and there was even a trace of blood biting out of the corner of his mouth, suddenly, a familiar greeting sounded in his ears, and when he looked up, he found that Xia Yin had walked in, although his face was a little pale, but he saw that Xia Yin's eyes were full of determination.

"Xiao Yin, what are you doing here?" As soon as the words came out, Xue Yu felt that he had asked an idiot question, isn't this an obvious thing, what can make the weak Xia Yin overcome his timidity, only come in and solve the case with him, or rather, provide him with a little clue.

"Help you." Sure enough, hearing this question, Xia Yin stared at Xue Yu for a long time with an idiot look, said lightly, closed the bedroom door and began to check carefully, Xue Yu was not good about this, he knew that he couldn't get rid of her at all, and sometimes Xia Yin's stubborn temper couldn't even stand her boyfriend Cui Minzhou.

"Now, Brother Xue Yu, can I ask you another question?" Zheng Hanfei naturally didn't know what happened during this period, and when he saw that there was one more person at the scene of the crime, he was just slightly stunned, so he accepted it happily, and asked Xue Yu, "Can you tell me how you solved yesterday's murder and how to prove that Cui Minzhou was the murderer who killed Lu Huihui." ”

"Well, I'll keep it a secret for the time being, and I'll tell you when the double secret room is unlocked." Xue Yushen said mysteriously, seeing the dissatisfaction on Zheng Hanfei's face, he felt that it shouldn't be like this, so he had to give him a hint, "Actually, the key is the puppy you picked up, the snow on Lu Huihui's body, and the disappeared belongings, these three doubts are strung together, I have come to this conclusion, you can think about it when you have time." ”

Are the three doubts strung together? Zheng Hanfei tilted his head and thought about it, for some reason, with this hint, a spiritual light flashed in his head, but unfortunately Zheng Hanfei didn't grasp it well, so that this spiritual light escaped, and at the same time, Zheng Hanfei didn't notice that another consciousness in his mind was quietly coming......