traces of all things

"What? You said no?" Captain Cha Qing spoke suspiciously, rubbing his head frantically, looking like he wanted to pluck out some of his hair.

"Really not." Tang Shaoyuan, who was stared at by him, looked helpless, and couldn't wait to pat his wrinkled white coat: "First, the DNA on the cigarette butt shows that the smoker and Sheng Wenhao's son There is no kinship, and second, the DNA on the cigarette butts is not compared with the one in the database."

"Captain Cha, calm down." Lu Zheng saw that he wanted to grab Tang Shaoyuan's collar, and quickly persuaded the source of danger: "Since this is the case, it is not a bad thing. What we are facing now are two One possibility is that Sheng Wenhao collaborated with others to commit the crime, or hired a murderer. But this situation has been denied by his bank statement, and if he hires a murderer, he can make his own alibi, and there is no need to abscond. The other one, that is Sheng Wenhao himself, is likely to be more ominous than good."

These words were like a bucket of cold water poured on Captain Cha Qing's head. He took a deep breath, calmed down for a few seconds, called the investigators around him to order twice, and lit a cigarette. , frowned, and took a breath: "Sheng Wenhao put it aside first, how can such a person have no criminal record?"

What Captain Zha said makes sense. From the perspective of criminal psychology, it takes time for a murderer to "develop". Except for a few heinous lunatics, most murderers have certain omens before committing serious crimes. Such as petty theft, abuse of cats and dogs, or other forms of crime with slightly lighter punishments, it is indeed unreasonable to be able to complete several serial murders so skillfully and skillfully.

Seeing the smoke ring exhaled by Captain Zha, Lu Zheng suddenly had an idea.

"Captain, there is another way to find out the suspect! We can use the surveillance video at the entrance of the alley!"

**

Wei Xiongfeng had just returned from a visit and investigation outside, and he was dragged to the surveillance video analysis room by Lu Zheng without breathing evenly.

"Ah! Team leader! Wait, let me drink water first—" Wei Xiongfeng hurriedly poured down half a bottle of mineral water, wiped his mouth, and then turned on the computer and asked, "What's going on? What are you looking for?"

"Look for the suspects, and frame all the suspects." Lu Zheng's tone was light and excited: "Just use the video at the entrance of the alley..."

"Huh?!" Before the words finished, Wei Xiongfeng turned his head with a "funny" expression on his face: "Team leader, do you know how many people passed by that alley when the crime happened?"

"Be patient and listen to me!" Lu Zheng patted Wei Xiongfeng on the head without the love of his colleagues: "Just now Shao Yuan and I took the investigators to do a field test. We entered the building from the entrance of the alley and arrived at the murderer's ambush. The scene takes 15 to 17 minutes. According to the length of the cigarettes, it takes five to six minutes to smoke each cigarette. There are six cigarettes in total. Under normal circumstances, the murderer will leave the scene as soon as possible after the shooting. In this way, we You can work backwards from the time of the incident, check the surveillance video during the appropriate time period, screen out all the suspects in the video that match the characteristics of footprints, and then investigate the identity one by one to confirm the alibi.”

After hearing this, Wei Xiongfeng was amazed, and nodded with a look of admiration on his face: "Tall, it's really tall."

"I know you're short, so hurry up and work." Tang Shaoyuan also entered the surveillance video analysis room at some point, and Wei Xiongfeng yelled at him as soon as he finished speaking.

Wei Xiongfeng was about to explode as soon as he heard it, but Lu Zheng's hand was on his shoulder, so he didn't dare to make a mistake, so he could only moan and whine, and turned around to count the monitoring time.

He kept muttering in his mouth.

You can hear it clearly if you get close, and it's full of words like "flatterer", "do not do business", "grab grandpa's job".

Despite the resentment, Wei Xiongfeng's hands were not idle, and he quickly intercepted a video about 10 minutes long and made it clearer. The location of the camera is very good, facing the entrance of the alley.

"OK, the suspect should be one of the people who passed the camera within the 10-minute window." He said quite proudly.

"Great, zoom in on the big screen, double the speed, and let's look for it together." After Lu Zheng ordered, he half-closed his eyes and quickly flicked over from the upper left corner of the screen.

This period of time is rush hour, and there are indeed many pedestrians passing by in the video surveillance. At first glance, everyone seems to be relatively relaxed. For the time being... there are no particularly suspicious people.

Lu Zheng and the others didn't relax at all. Whenever they saw a middle-aged man who was not tall or of medium weight, they would pause to check carefully and record it.

Soon, the 10-minute video was coming to an end.

At this moment, Lu Zheng's attention was quickly attracted by a figure.

It was a man in ordinary clothes with a satchel on his back. He was wearing a peaked cap that is often seen in tourist groups. He looked about forty years old. When he walked, he seemed to be looking left and right, and was in a hurry with his surroundings. There is a subtle contrast between the pedestrians.

What's more, there is a slight sign of lameness on his left foot.

"Nobita..."

"Nobita..."

Two simultaneous voices sounded again, and Lu Zheng turned his head to see that it was indeed Tang Shaoyuan. He couldn't help but exchanged glances with him, showing a clear smile.

**

Because the suspect is likely to carry guns and ammunition, the criminal police who went to the suspect's house all matched the 64 style.From the point of view of multiple people with multiple strengths, Lu Zheng, Wei Xiongfeng, and Geng Zhizhong, the technical police officers who came to support the provincial department with proficient marksmanship, all joined the battle.

Tang Shaoyuan was left alone, squatting in the city bureau building with a bit of remorse.

"Shao Yuan, you don't have to go. After all, there may be gunmen, and you haven't got a gun." Lu Zheng comforted him: "Don't be discouraged, your strengths are not here, look at the other technical police officers of the city bureau, Wang Fayi, Zhong Fayi and the others didn’t go either.”

Tang Shaoyuan: ... so angry!Go back to the shooting range to practice!

"The suspect's name is Kong Ping. He is 44 years old. He is single. He is a warehouse clerk of the asset storage company. His left foot was involved in a car accident in the early years. He lives at No. 21 Hepingli. According to the testimony of his colleagues, he is usually taciturn and not talkative. , I only like military things, I carry a fake military bag in and out every day, my hands are very dexterous, and I am good at assembling some small utensils."

Captain Cha Qing stood at the door of No. 21 in Hepingli, and explained to Lu Zheng in a breathy voice.

Lu Zheng nodded in understanding. This person's file does have certain similarities with the gunman described by the Municipal Bureau.

Kong Ping lives in an urban village, probably because the rent and land prices are relatively cheap. There are many small courtyards and bungalows in this area. No. 21 Hepingli is one of them. According to the information obtained by the police, this small courtyard Normally, only Kong Ping should live alone.

In order to minimize the possibility of criminals being caught dead, Captain Cha Qing quickly deployed police forces in all directions in the small courtyard where Kong Ping lived. Knocked on the courtyard door of the small courtyard.

"Is Kong Ping there?" He asked with a raised voice.

There was a deathly silence in the courtyard.

However, according to the testimonies of colleagues and neighbors, Kong Ping should have stayed at home at this time.

Captain Zha squinted his eyes and knocked on the door again. Similarly, there was no one answering in the courtyard. After waiting for a while, he pouted and made a gesture of rushing in, and a guy with a size could hold him at least twice. Together with the strong criminal police, they kicked towards the gate of the small courtyard.

"boom--!"

There was a loud noise, and the old courtyard door fell down. A middle-aged man, wearing a white vest and shorts, was standing in the middle of the courtyard. He was looking at the door in horror, and subconsciously turned to escape.

has a problem!

Lu Zheng narrowed his eyes, raised his feet and rushed in, quickly shouting: "Don't move! Police!"

The middle-aged man didn't stop his footsteps at all when he heard the words, but his left hand was not very flexible, so he was no match for a well-trained criminal policeman. Seeing that he had no place to hide a weapon, Lu Zheng rushed forward without hesitation. Go forward, and together with a few criminal policemen, knock him down neatly to the ground.

"It's not me! I haven't done it!" The middle-aged man seemed to be terrified, and yelled in a panic.

"Then why are you running!" Captain Cha Qing was one of the first people to rush up and hold him down. Regardless of his thin stature, his strength is really amazing.

The middle-aged man was still struggling in vain, and his whole body was twisted against the ground. Seeing that he really refused to obey, the criminal police had no choice but to put restraint measures on him.

Here, Lu Zheng and others escorted Kong Ping back to the Public Security Bureau, while a team of investigators stayed to search Kong Ping's home, trying to find the 7.62mm gun and the ammunition that matched it.

**

"Kong Ping, why did we bring you into the bureau today?" Geng Zhizhong sat in the questioning area and asked slowly.

Kong Ping sat silent in the restraint chair, looking flustered.

"Do you know these things?" Upon seeing this, Captain Cha Qing directly placed a small box on the table, and lifted the lid, revealing countless tiny metal tubes connected with some wires.

Kong Ping's eyeballs flickered, and beads of sweat rolled down his forehead.

"Fuck, there are so many detonators, what is this kid doing? Exploding mines?" Wei Xiongfeng stood outside the interrogation room, watching through the observation window, and said to himself.

"Wei Daxiong, please help me go in and call Captain Cha Qing."

The sudden voice from behind startled him a lot, and when he turned around, he saw Tang Shaoyuan with a poker face, and was instantly upset: "Who are you? It's not Brother Lu. If you let me in, I'll go in. Then I'll go in." Isn't it embarrassing."

Tang Shaoyuan glanced at him meaningfully, said "Oh" indifferently, and pushed the door directly into the interrogation room.

Wei Xiongfeng: ...so angry that he exploded!

Soon, Captain Cha Qing followed Tang Shaoyuan out of the door: "Forensic Doctor Tang, what's going on?"

Tang Shaoyuan put a chart in front of him with a serious face: "I'm afraid this Kong Ping is not the murderer—"

Wei Xiongfeng's eyes widened in disbelief.

Tang Shaoyuan looked at Captain Zha's blue face, and added the remaining half of the sentence: "—the DNA did not match."

Before Captain Cha Qing had time to scold his mother, another clear voice rang out from here.

"Shao Yuan is right. I just compared Kong Ping's footprints. Although they are all size 41, the way of applying force does not match the degraded shoe prints left at the scene."

The one who spoke was Lu Zheng who came in a hurry, holding two photos of shoe prints in his hand.