If the previous possibilities are ruled out, the case is now even more confusing. Because the people related to Wu Qiongqiong have been ruled out of criminal suspicion, then who will brutally rape and kill Wu Qiongqiong?

There is only one case left, and that is the chance murder of a stranger.

After Lao Lu returned to the criminal investigation team, I told Lao Lu about this speculation, and Lao Lu expressed his support.

Then the direction of detection should be concentrated on the crowd of people who passed by the slaughterhouse on the day of the crime.

Now there are two directions of detection, the first is to find out everyone who went to the slaughterhouse on the day of the crime; The second is to investigate all the people who appeared in the surveillance video of the ecological planting company.

These two 'all' will, of course, make it extremely difficult for the police. But sometimes, handling a case is like a big river fishing for sand, and it must be investigated in this way.

Lao Lu divided the criminal investigation team into two groups, one group was responsible for investigating the slaughterhouse, and the other group was responsible for investigating the characters who appeared in the video.

I sketched out the five key people in the surveillance video of the ecological planting company, and asked the investigators to focus on these five people.

The investigation lasted for a month, and all 77 people who had been to the slaughterhouse on the day of the crime were discharged, 101 people appeared in the video footage, and 100 people were discharged. Lao Lu and I met with these 100 people one by one and conducted inquiries and investigations. Then out of these 178 people, there is still one person left who has not been found.

And this person is the focus of my initial investigation.

There is play.

We focused on the surveillance video of this person.

From the time the suspect appeared in the video to the time he disappeared in the video, it was a total of 11 seconds. So let's take a look at the physical characteristics of this person, this is a middle-aged man, about 40 years old. He is wearing a short-sleeved shirt with horizontal stripes on his upper body, although the surveillance screen is colored, but the color quality and picture quality are not very clear, so the horizontal short-sleeved shirt may be black and white, or blue and yellow, in short, the stripes are one deep and one light.

The pants and shoes are well distinguished, with cyan pants and black leather shoes.

This person's walking movement is very distinctive, the right foot has a clear outer figure, but the left foot is very normal.

And he walked to give people the feeling of being in a hurry, and when he passed by the monitoring probe, he also looked at the position of the probe.

It's a pity that although he gave a positive face when he looked around, because of the poor quality of the surveillance, this front face is also a blurry picture, and it is impossible to accurately judge the facial features of this person.

In the whole surveillance footage, I found a detail, that is, the moment the suspect entered the surveillance video, he seemed to have put something in his pocket.

When the frame is still, we can see that his right hand is about to enter the right pants pocket, and the palm of his hand is white and lumpy.

We saw in the surveillance at the Wanzhou bus station that the deceased Wu Qiongqiong was using a white mobile phone, but this mobile phone was not found around Wu Qiongqiong's body. So the suspicious man in this picture now, will he have a white mobile phone in his hand? And will this white phone be Wu Qiongqiong's?

Now all the focus of the investigation is on this suspicious man.

Lao Lu intercepted the 11-second video and put it on the public security network to assist in the investigation, hoping that other police officers who handled the case could see who this person was?

At the same time, Lao Lu organized a large number of police forces and began to visit Dongjia Town, hoping that someone could recognize the suspicious man in this video. Another half a month of hard work, with nothing. Then obviously, the murderer is a rogue case, not a local.

The case is almost unsolved, but I have one person in mind, and this person is also in my 26-person think tank.

I don't know his real name, only that his surname is Lin, he is a police officer, and his WeChat name is also a 'Lin'. And I know that Officer Lin has a unique skill that he calls 'Shadow Graphics'.

This 'shadow figure' is based on a blurred portrait and draws a clear face behind the blurred pattern.

It's a bit of an incredible, but the portraits he paints bear a strong resemblance to his real faces. Because of this unique skill, he has solved many strange cases, which deeply impressed me.

Now there is a bottleneck in Wu Qiongqiong's case, and this bottleneck is that we cannot judge the appearance and identity of the suspect.

So I sent a screenshot of the suspect's blurry frontal video to Officer Lin. Officer Lin quickly replied to me: Are you testing my drawing skills or the needs of the case?

I replied: Yes, on the merits.

Officer Lin replied: Okay, this is a frontal photo, give me two hours.

I replied with a thank you.

Two hours later, Officer Lin sent me a painting of Gongbi and sent me a message: The portrait is more than 90% similar to the real person in the video.

90%, almost the painting can be posted as a photo on the public security network for seizure.

I handed over the portrait to Lao Lu, who quickly posted it on the public security website, hoping that the comrades of the whole country would help to find the criminal.

The next day, I received a call from Lao Lu, who said excitedly on the phone: "Just now Captain Wang of the anti-drug team called me, saying that the person in the portrait is very similar to the drug dealer they have been following for half a month, and Captain Wang also confirmed that the drug dealer also wore a black-and-white, striped short-sleeved shirt in the video." He also sent a video of following this drug dealer, you can come to the criminal investigation team to see it. ”

I rushed to the criminal investigation team non-stop, and Lao Lu opened the video sent by Captain Wang to me.

The video is a screenshot of a hotel corridor surveillance video, from the video, it is clear to see that the suspect is dressed, which is indeed the same as the suspect in the video of the ecological planting company, the only difference is that the man is also wearing a large satchel.

Lao Lu said that the big satchel was carrying drugs. I wonder a little, how can Lao Lu be so sure?

And I found that the man in this video also walks in the same posture as the suspect in the previous video, with his right foot outside the figure eight and his left foot normal.

I immediately said: "This person is the suspect who killed Wu Qiongqiong." Lao Lu, hurry up and arrest him. ”

Lao Lu smiled: "This person has been controlled by the anti-drug team, and in his big satchel, more than 170 grams of methamphetamine and more than 90 grams of heroin were found. ”

I said, "Hurry up and interrogate." ”

Lao Lu and I came to the anti-narcotics team, and Captain Wang of the anti-narcotics team was interrogating the suspect.

The suspect's name is Zhou Qike, male, 43 years old, but judging by his short pale hair and wrinkles crawling all over his cheeks, he looks more like a man in his fifties. He sat at the interrogation table, looking very calm and expressionless, but his eyes were cruel and cunning.

He was wearing the same black and white striped short-sleeved shirt, and the pants were different, a pair of gray and white trousers, but the shoes were still the same leather shoes.

Captain Wang arrested this person, so he confessed to drug trafficking, because he knew that it would be difficult to escape justice now.

Lao Lu has been calling, and he wants to check whether Zhou Qike has a criminal record.

This check really found out.

Zhou Qike, who had served a prison sentence in '95 for intentional wounding, was released in August 2010.

In December 2011, he was arrested for drug use and released in March of this year.

Unexpectedly, it has only been more than three months, and this week Qike was arrested again.

Captain Wang gave up the interrogation position to Lao Lu, and Lao Lu said solemnly: "Zhou Qike, what did you do more than a month ago?" ”

Zhou Qike actually said with a smile: "More than a month ago, I ate and slept and." ”

Lao Lu slapped the table vigorously and said, "Don't you remember the girl you killed in the Dong family's slaughterhouse?" ”

I could see Zhou Qike's eyes flickering, but he immediately smiled and said, "Comrade police officer, don't slander good people, I haven't killed anyone." And what a slaughterhouse, I have not been there at all. ”

Zhou Qike looked very calm, insisting that he didn't kill anyone, and Lao Lu didn't have anything to do with him. But Zhou Qike said that he had not been to the slaughterhouse, which was obviously lying.

During Lao Lu's interrogation, I kept thinking of ways to get Zhou Qike to speak. I first thought of DNA exploration technology, I can pretend that it is a residual skin dander found in Wu Qiongqiong's nails, as long as Zhou Qike's blood sample DNA is compared with the dander, I can determine whether he is the perpetrator or not.

But looking back, Qike has been imprisoned twice this week, and his DNA should have been in the database for a long time, if the police found his DNA on the deceased, would they still need to interrogate him?

But I immediately thought of another way, so I said, "Zhou Qike, have you washed the soles of your shoes recently?" ”

Zhou Qike said with a smile: "Comrade police officer, who has nothing to wash the soles of their shoes?" ”

I said solemnly: "Okay, please take off your shoes, because the soil around the Dong family slaughterhouse is very special, some animal blood stains remain, if you have not washed your shoes, we can extract the soil residue from the sole of your shoes and compare it with the soil near the slaughterhouse, and determine whether you have been to the slaughterhouse?" ”

When Zhou Qike heard this, his face turned pale all of a sudden, and he kept wiping the soles of his shoes.

I pretended to be loud and said to the police in the examination room: "Hold his feet, don't let him wipe the evidence off." ”

The two policemen hurriedly pressed Zhou Qike, who was desperately wiping the ground with his feet, otherwise his feet would touch the ground again.

I said coldly: "Zhou Qike, if you admit it now, you may be able to save your life, but if we wait for us to investigate and compare, you will definitely die." ”

Zhou Qike was already paralyzed at this time, and muttered: "I recognize it." ”

It turned out that Zhou Qike went to Dong's house to sell drugs that day, and when he passed by the slaughterhouse, he found Wu Qiongqiong, who was quite attractive, so he was sexually angry, so he followed Wu Qiongqiong, and finally threatened Wu Qiongqiong with a dagger to come to a remote place, rape her, and brutally cover her to death afterwards. As for the reason why no sperm spots were found in the deceased's body, it was because Zhou Qike often visited the kiln and carried a condom with him, and he also knew that the police would find him through the DNA in *, so he brought a condom to commit the crime.

Lao Lu then asked me, how did you come up with the method of screening the murderer through the soil?

I said, "Foolish! ”