The Underworld Detective

Instead of leaving the scene, I called Huang Xiaotao and asked her to bring my tools.

When I heard that I had been attacked, the others immediately arrived. As soon as Huang Xiaotao came up, he asked: “Are you hurt? ”

I shook my head: "No injuries. Remember the mystery man who saved our lives last time? He just saved my life. ”

Huang Xiaotao glanced at the steel pipe that had been cut open. “You mysterious bodyguard is strong enough, why didn't you grab the killer? ”

Who knows what this guy's thinking!

I asked Huang Xiaotao to light up the ultraviolet light and use the autopsy umbrella to look at the footprints. There were three footprints, mysterious, a pair of 40-size sneakers and a pair of 35-size leather shoes, and I asked Cho to sample the plaster.

Huang Xiaotao asked: "Do these two attackers have anything to do with the killer? ”

I said: "It matters a lot, they may want to kill me...”

It's just my guess. If you really want to kill me, it's inefficient. Why don't you use a dagger?

I found some solidified cement on the pipe, but no fingerprints, apparently the killer was wearing gloves. At this time, Wang Ai Dynasty returned from the other side of the alley with exactly the same steel pipe in his hand: “There is a worksite next to it, the murder weapon was taken at will from the worksite. ”

It wasn't deliberate? That's exactly why.

Huang Xiaotao asked: "By the way, Song Yang, why are you buying sanitary napkins? ”

I slapped my head: "Oh no, Sun Bingxin is still sitting on the toilet! ”

Huang Xiaotao said without words: “Why didn't you say so? I have it in my bag. Next time don't go out late at night alone. ”

I nodded: "Got it! ”

After the investigation, we went back to the hotel. In addition to the identity of the killer, my bigger confusion was who was the mystery man? A car came across the road, and I deliberately slowed down my footsteps and suddenly took a step forward when it arrived in front of me.

A thrilling brake sounded and the driver shouted: "Kid, you want to die! ”

Huang Xiaotao heard the noise and ran back. He blamed him: “Why are you not careful crossing the street? ”

I said, "I want to see if the mystery man will come and save me. ”

Huang Xiaotao smiled bitterly: “Your thoughts are really unusual. How can you try this? How worthless is it if you collide? If you really want to find out, we'll use forensic methods to investigate. ”

The next day, Huang Xiaotao told Sun Bingxin to take a day off at the hotel, and we went to visit the repair shop together. There are only a few auto repair shops in Xiao County. I heard them before noon. A auto mechanic named Cao Dazhuang disappeared last year. I asked the boss: “Did you report the incident? ”

Boss flipped out his phone and found Cao Dazhuang's last text message, which said: "Boss, I'm sorry to say goodbye, my cousin in town asked me to help, I don't want my salary! ”

This is the killer's usual technique, and I think the deceased should be Cao Dazhuang, but only if there is DNA evidence. We asked the boss Cao Dazhuang's address, and the boss replied: "He rented the house and probably changed tenants long ago. ”

Nevertheless, we asked for an address to find the landlord who rented the house. The landlord said that Cao Dazhuang had said goodbye at the time. His friend came to help pack things and move the house, and paid the owed water and electricity fees.

I said, "What's the friend's name? ”

The landlord shook his head: “I don't know, more than six months ago. ”

I asked, "Say whatever you can think of. ”

Host remembers carefully: "Looks like a tailor! I met this guy once at his shop and said hello. ”

I asked for the address of the tailor shop. I didn't think Cao Dazhuang's friend was Zhang Qiang. I exchanged sights with Huang Xiaotao. It was a coincidence. I hid that there was a connection between the two cases.

Farewell to the landlord, Huang Xiaotao asked me if I wanted to go to the tailor shop again, and I said, "No! ”

Huang Xiaotao laughed: “You are a good learner. ”

The more the police often suspect who, the less likely they are to strike a snake, the more obviously Huang Xiaotao, like me, has already suspected Zhang Qiang!

So many times I've been involved in solving a case, it's become a habit, if I suspect someone, to put him in the profile of the killer. Now the murderer's outline is still a dark shadow, but put Zhang Qiang in, as if there was not much contradiction.

Huang Xiaotao asked me what I was going to do next. I said I wanted to sort things out, and she said, "Let's eat."

I bought a map of the whole county from a newspaper booth on the side of the road, and then came to a Chinese fast food restaurant with Huang Xiaotao. I stalled the map on the table and showed the permanent location of the four victims. Huang Xiaotao brought a plate of food and said: “Song Shen Tang, are you going to do the same thing again? ”

I shook my head: "No, I was just wondering what the victims had in common. ”

Huang Xiaotao said: “They are young and beautiful women. ”

I corrected, “You said something in common, I said something in common! In other words, are there any intersections between these four women in different occupations? ”

Huang Xiaotao said: "Women like clothes. Perhaps when they go to order clothes, they are targeted by the murderer. In this way, the couple's suspicions are even greater. ”

And I was like, “Is that it? ”

Huang Xiaotao said: “I sent someone to find out where they had been before they died and verify it. ”

I nodded, "Okay, let's do a crime simulation this afternoon! ”

Huang Xiaotao was surprised: "Ah? ”

I explained: "Normal crime simulation, not murder technique! ”

We went back to the bureau and had a brief case discussion. Huang Xiaotao sent someone to investigate the whereabouts of the four deceased a month before his death, as well as Cao Dazhuang's relationship. At the end of the seminar, we found an empty conference room to simulate the first homicide, and the file said that the victim had been demolished by hot oil during his life, and that the fatal injury was a blow to the back of the brain, which I felt was a contradiction when I restored it.

Huang Xiaotao said, "I think, as you said before, there are two murderers! ”

I shook my head for a while: "I'm not talking about this. If we're the murderers, how do we get this murder done seamlessly? ”

Huang Xiaotao said: “First, you can't leave fingerprints, wearing gloves is necessary; second, you can't use too many tools, such as electric drills and chemical agents, which are too easy for the police to trace; and also, you should try to hide the body dump, the later you find out, the better for the murderer. ”

I said, "If you were a tailor, would you take it off if the victim was wearing clothes from your shop? ”

Huang Xiaotao immediately replied: "Of course! ”

And I went on to say, "What do you think would be the best way to destroy your face? ”

Huang Xiaotao replied: "Alkaline water, edible alkali is available everywhere, easy to store, clean up, cooking a pot of hot oil is a bit of a hassle, and it is easy to leave traces at home. ”

I nodded: “You're right, the first homicide was a little inefficient, and the technique looked amateur! But surprisingly, the rest of the case follows this pattern, as if the killer was deliberately trying to show his style, really to accompany a folklore that the police wouldn't believe at all? Or… the first homicide was just an unintentional act, the rest was all imitating it! ”

Speaking of which, my mind became clearer: "I guess this is a gradual serial killing! ”