I listened to Leng Tong's words and nodded again and again, just now in the conference room, I put forward the first two points of the three suggestions for Dong Lao to discuss, and the first two points did not make sense, so I even denied the latter point, that is, the handwriting was not left by the murderer, and the murderer did not need to change a child's math problem.

Leng Tong leaned over again at this time and whispered: "Today's incident once again proves our idealized inference. ”

"You mean when it happened?" I know what Leng Tong meant, after all, the two of us are still chasing to Sanjiang Hotel.

Leng Tong nodded and said, "Isn't it?" This time it happened on the street, about the same time as we set off to the Sanjiang Hotel, that is, if the murderer just wanted to buy something and left, then he appeared at the store at about 11:35, and then went to the Sanjiang Hotel, which coincided in time. ”

I had to nod, although this inference is not so rigorous, there is some truth, just now we also vaguely saw a back in the Sanjiang Hotel, and it may not be a murderer, it may have come out of the Sanjiang Hotel to the back building, but after all, I saw it.

Leng Tong said again: "Also, this person often haunts Jingwei Street, which has also been confirmed, at least for the past few days after the crime, he has been on Jingwei Street!" ”

I nodded again and again, there is indeed some truth, but the case is still clueless, even if this inference is very accurate, we have no evidence, how can we catch the murderer?

When I returned to the guest house this time, it was already more than three o'clock in the second half of the night, and I didn't go to trouble Leng Tong, and Leng Tong didn't say anything to discuss, so I went back to the room with Da Leizi and Xing Team to rest.

Originally, I wanted to communicate with Team Xing, Team Xing is also very experienced, but Da Leizi soon snored, his voice was deafening, he couldn't hear what he said, and he couldn't sleep, so he was so angry that Team Xing scolded and rested helplessly.

In the morning I was awakened by a knock on the door, probably the voice of the big thunder was lower, I really heard it, and quickly got up to open the door.

Standing outside the door was Leng Tong, with a hint of joy on his face, and took my hand out and said, "Xiaoxiao, I have guessed the murderer's motive for killing, let's go to the police station in a while to find photos of the first case and take a closer look." ”

"What motive?" I asked, somewhat incredulously, "How did you guess that?" ”

"The murderer may have some kind of illness, or a hidden mental illness." Leng Tong pursed his mouth and said, "I remembered what Da Lei Zi said about the rip girl in the conference room, do you know what the rift girl killed people for?" ”

I shook my head: "I don't know, I haven't heard of it." ”

"According to legend, she was called the Crack Girl because she had a failed plastic surgery and her mouth was grinning." Leng Tong continued: "So she is very sensitive and extreme about her appearance and mouth, and she kills people at every turn. I guess it's very likely that the murderer had this hidden disease, which caused him to have the idea of killing in an instant. ”

I sounded a little mysterious, so I asked, "You mean the murderer is also asking questions to the victims?" Kill someone if you answer wrong? ”

"Not necessarily!" Leng Tong immediately said: "But the three victims had a common characteristic before they were killed, that is, they were doing something, and they also communicated with the murderer, I thought of the girl's homework book, and guessed that the problem might be in what they were doing!" ”

I hurriedly asked, "Then what are you looking for?" ”

Leng Tong looked inside, Xing Team and Da Leizi were sleeping, and then said: "When the first case happened, the victim was cutting his nails, and the nail clippers were still thrown aside, I want to find a photo, see if there is anything wrong, maybe I can find the purpose of the murderer's murder, don't ask first, go wash up, let's go." ”

I hadn't thought about these things originally, but I only noticed when Leng Tong mentioned it, and I thought about it while washing, and soon followed Leng Tong's beautiful woman out.

When I went downstairs, I said: "Tongtong, if you infer it like this, there is indeed something in common, the three victims are doing something, the first is cutting nails, the second boss lady is doing puzzles, and the little girl last night is doing her homework!" ”

"Yes!" Leng Tong looked very happy, and said with a grin: "You go on!" ”

I thought about it for a moment and then continued: "If that's the case, there was something wrong with the boss's puzzle in the second case, and there were two missing pieces on it, as you said, I didn't care about it at the time. Yesterday, this little girl was doing her homework, and the question was wrong, and there were traces of suspected alteration by the murderer! ”

"That's right!" Leng Tong really wanted to laugh this time, his small mouth was grinning wide, and his eyebrows were curved: "I knew you were smart, we could think of going together, I just wanted to make sure what the victim of the first case was doing and what was wrong." ”

I was also interested in Leng Tong's words, and I also came to the bureau compound, and immediately followed Leng Tong upstairs.

Team Zhang came early, and the two of us also directly told Team Zhang that we were going to come to the file of the first case and read it carefully.

The body of the victim in the first case has long been disposed of by the family, and we can only look at the photos, which are the photos of the scene of the murder, and I also know what Leng Tong means, looking carefully at the hands of the corpse, I still can't see it clearly.

Leng Tong found the help of the police officers, used multimedia to enlarge the photo, and carefully looked at the victim's hands.

After zooming in, it is a little blurry, but you can also see that the uncut nails are very long, and the cut nails are very flat, this can be seen, and there is nothing abnormal.

Leng Tong looked at the photo, and after a while, he stretched out his little white hand, looked at his nails carefully, and quickly grabbed my hand and looked at it again.

I also found some problems in the process, that is, the front of the victim's nails was flat, and there were extra nails on both sides that were not trimmed, while we both had round fingertips and trimmed both sides, which was the only difference.

I gestured on Leng Tong's fingernails and looked up at Leng Tong.

Leng Tong also nodded, staring at me with big eyes, and whispered, "The way he prunes is not used to him?" It belongs to the hidden disease in the heart, is there such a possibility? ”

"It's possible." I smiled and said, "But that's not necessarily, right?" It's unbelievable that such a small thing can kill someone. ”

Leng Tong thought for a while and said: "Other possibilities are even less likely, no one has the idea of killing people in an instant, especially the three victims are not the same kind of people, there is nothing in common, everyone analyzed you yesterday and heard it, even if it is a murderer, there are traces to follow." ”

I couldn't help but nodded, and I couldn't explain anything else, so I asked, "Even if we find common ground and guess the murderer's motive for killing, let's say it's correct for the time being, so what do we do next?" We don't have any proof, do we? ”

"yes!" Leng Tong also looked at me with wide eyes: "There are no witnesses, no footprints, and no fingerprints to compare, how can we solve the case?" ”

I asked the police officer to put the photo away, and sat down with Leng Tong and stared at each other with wide eyes.

In the end, Leng Tong said: "Although our idealized reasoning may not be correct, there is only this way feasible at present, and the motive of the murderer has also been found, let's find out who the night shift people in Sanjiang Hotel are today, if it really doesn't work, we will take the last way and take a look at it again in the interrogation!" ”

"Good!" I nodded in agreement.

I also think that this case can't wait, although it is all speculation, and it is somewhat reasonable, at least in terms of time, there is no connection between the three victims, and there can be no common enemy, but the three victims also have something in common, that is, they are all doing one thing.

These speculations may not be accurate, but there have been three cases in the past, and I don't know when it will happen again, and I don't know what Jingwei Street will be nervous about today, and everyone's rumors must be even more terrifying.

Coming out of the office, I saw Da Leizi in the corridor, this guy didn't get up until this time, and he was still looking at every office, he should be looking for the two of us.

Sure enough, when I saw the two of us, I laughed: "You two are really in good health, you haven't slept much in the past few days, and you got up so early and ran out secretly, which made it easy for me to find it!" ”

"Let's go!" Leng Tong waved his hand: "Let's go, investigate the case." ”

Da Leizi found the two of us as if he was relieved, and he smiled and followed the two of us downstairs.

The three of us came all the way to the Sanjiang Hotel and found a minister surnamed Liu, who was the person in charge of the engineering department, and inquired in detail about the personnel on duty at zero o'clock.

After some investigation, we learned from Minister Liu that there were only six people on night duty at night, responsible for the maintenance and repair of power supply, elevators, facilities and equipment in the whole building.

Because these six people live nearby, the six of them work night shifts all year round, and the salary is higher, and they are willing.

Of these six people, three are very tall, and since they are maintenance workers all year round, it is normal to have strength.

As for these six people, they usually perform very well, have never had any problems at work, and are very conscientious and responsible.

The three of us also wrote down all six people, including their home addresses, and it was enough to write down only three tall ones, but considering that our analysis may not be accurate, maybe a short man can do it, as long as he has a lot of strength, after all, the murderer committed the crime without the victim's accuracy, and there is a child among them.

After leaving the hotel, Leng Tong looked at me and said, "Further verification, right?" ”

"Hmm!" I also have to admit: "There are indeed a few people who live nearby and work night shifts all year round. At first, we couldn't find the murderer's motive for killing, and it was a random crime, and we didn't investigate, which was a little difficult to understand, but if we deduced the motive for killing, the impulse to kill was instantaneous, and it would be explained. ”

Leng Tong also stared at me and said: "Yes, there was some conflict at first, since the murderer often appears here, there is no reason not to know the situation on both sides, and he dares to kill people when there are people inside, there is an irrepressible impulse." ”

"One more thing has been confirmed." I also stared at Leng Tong, and then said: "They do have a more reasonable identity, and they don't have any bad deeds. ”