The police station received a report from an old lady who said that her son Yao Gang had disappeared last night, and that she suspected that a man named Chen Song had kidnapped him.

Because his son Yao Gang accidentally hit and killed Chen Song's three-year-old son by drunk driving a few years ago, he was later sentenced to prison and did not come out until two days ago.

The old man repeatedly requested, and it happened that Lao Ji had handled Yao Gang's case a few years ago, so he promised the old lady to go to Chen Song to ask about the situation.

When he came downstairs, he happened to meet Chen Song, who was going to work, and Lao Ji directly asked him if he had anything to do with Yao Gang's disappearance. Chen Song said that he had no idea that he had been released from prison, and if he knew when he would be released from prison, he would definitely go to the prison gate to block him.

After speaking, he said that he forgot to take his mobile phone, so he turned around and went upstairs.

Lao Ji felt that Chen Song's behavior was a little strange, so he lurked in the car and waited for him to come out.

Sure enough, Chen Song came out after a while, Lao Ji followed him all the way to the city center, and a man in black with a cap and mask met Chen Song, and the two separated again after a few simple explanations.

Seeing this, Lao Ji decided to separate from Sister Xi to track the two, Chen Song followed the instructions of the man in black to the underground garage, and drove away directly before Lao Ji arrived.

Lao Ji arrived late and wrote down the license plate number, and called the bureau to continue tracking.

Sister Xi followed the man in black through several alleys, and the man in black seemed to have noticed it on the road, and when Sister Xi came out of the alley, he suddenly appeared behind her.

The two immediately began to fight, and after a few rounds, Sister Xi was slightly inferior, but fortunately, Lao Ji arrived in time, and the man in black saw that the situation was not good and planned to escape.

Sister Xi took advantage of her unpreparedness to scratch his neck, leaving his skin tissue behind. Lao Ji stepped forward to check her injuries, and then looked up again, and the man in black was nowhere to be seen.

After returning to the police station, Sister Xi immediately asked people to extract the tissue in the nails.

In the conference room, Sister Xi told everyone that in the process of fighting the murderer, she vaguely smelled a smell of Chinese medicine. Everyone was shocked when they heard this, if it wasn't a coincidence, then the man in black who kidnapped Yao Gang and the masked man who poisoned him should be the same person.

Lao Ji agreed with his guess very much, because the height of the man in black was also about 1.8 meters. But the range of clues I got now is too large.

The man looking for the smell of Chinese medicine was undoubtedly looking for a needle in a haystack, and the only clue now was the car that the man in black arranged for Chen Song to drive away.

The colleague in charge of tracking traffic that afternoon told them that the suspect vehicle had been spotted in Nanshan Park. Unfortunately, the police found the missing Yao Gang from the trunk.

Sister Xi stepped forward to check, there were no obvious external injuries, and the cause of death was not obvious. A spelled note was also found under Yao Gang's body. It can be seen from the tone of the words that this masked man has gone crazy.

He even began to directly provoke the actions of the police, and every time he was one step slower.

Back at the police station, the forensic doctor examined Yao Gang's body and found that he had drowned. A large amount of alcohol was found in his lungs, and there were also marks of being bumped on his mouth.

From this point of view, the masked man was drunk to death.

Coming to the conference room, Lao Ji told everyone the cause of Yao Gang's death, and the police officer in charge of criminal psychology analyzed that the masked man tried Yao Gang by killing a child by drunk driving on the spot, and left a note provoking the police, and now he may feel that he is the judge of society.

The sense of accomplishment of killing people was gradually no longer satisfying him, and it was difficult to guess how far his ambition would swell later.

After listening to this, Xiao He told everyone that the skin sampling in Sister Xi's nails had come out, and after comparison, no information about this person was found in the database, but it could be judged that it was a man between thirty and forty-five years old with oily skin characteristics.

Then Lao Ji added that according to the battle between the masked man and Sister Xi, he should be proficient in some martial arts, and have a very meticulous anti-reconnaissance ability, and most importantly, he also knows some knowledge of chemistry and Chinese medicine.

In this way, it is very likely that this person is a veteran or a doctor, but Chen Song, who is now bewitched by the masked man, is still missing.

Lao Ji asked everyone to try to find more clues from the car that Yao Gang found at the scene.

After the meeting, Lao Ji came to Sister Xi to understand the situation, and in the process of talking with Sister Xi, a man suddenly walked in. The man is Sister Xi's college classmate Han Qiming.

Recently, I have just returned from studying abroad and am teaching at a medical school in the city. Han Qiming said that he had always wanted to ask Sister Xi for dinner, but Sister Xi had a lot of cases recently, so he ignored a lot of his calls.

So I personally invited her today, and Lao Ji also knew that Sister Xi had not rested recently, so he gave them a holiday. On the way to dinner, the two reminisced about their youth in college. looked very happy, but suddenly Sister Xi noticed that there was a faint smell of Chinese medicine in the car.

This reminded him of the man in black who had fought against her before, but then she immediately dispelled this idea, because he knew that the classmates next to him were good class presidents in college.

After coming to the restaurant, while eating, Sister Xi remembered Lao Ji's profile of the masked man. He is about 1.8 meters tall, between 30 and 45 years old, has oily skin, and most importantly, understands chemistry.

In order to verify her guess, she took advantage of Han Qiming's bathroom to secretly wrap his cup and obtain his saliva and fingerprints.

Han Qiming didn't seem to notice it when he came back, but when the two of them finished eating and were about to say goodbye, Han Qiming suddenly said: "If you want my DNA, just tell me directly, why do you want to change my cup." ”

Sister Xi saw that the situation was not good and was about to leave, but Han Qiming had no intention of hiding it, and directly stunned her with medicine.

In the police station the next day, Lao Ji didn't see Sister Xi go to work until the afternoon, and he turned off his phone when he called her, so he called the medical school and asked for Han Qiming's phone number.

Han Qiming, who received the call, threatened Sister Xi with a knife not to make a sound, and if he didn't cooperate, he would kill Chen Song, and he told Old Sister Ji Xi to go home after eating last night.

Lao Ji vaguely felt that something was wrong, so he came to the place where they ate last night, and with the cooperation of the hotel staff, he checked yesterday's monitoring, and also saw Sister Xi's action of changing Han Qiming's cup.

At this time, Lao Ji realized that Han Qiming was likely to be the masked man, and Lao Ji came directly to Han Qiming's house, and the two pretended to be polite after meeting.

Xiao He and others in the police station on the other side also found out that Yao Gang's car at the scene came from the second-hand car market, and found that the person who bought the car was Han Qiming from the surveillance screen that day.

At this time, Han Qiming also felt that the current situation was not good, and the two of them were silent for a while and shot at the same time, Han Qiming thought that it would be bad for him to fight like this, so he used the familiar environment to escape.

On the other side, Sister Xi, who was tied up, woke up the unconscious Chen Song, and Chen Song told her that she did not kill Yao Gang, but that Han Qiming forced her to take revenge.

But he really couldn't do this kind of thing, so he watched Yao Gang being drunk to death.

On the other side, Xiao He, with the cooperation of communication, quickly located Han Qiming's location, and they drove to an abandoned factory building, just blocking Han Qiming, who was about to transfer Chen Song.

Han Qiming held Chen Song hostage with a knife and asked the police to retreat, Lao Ji saw that he was getting more and more excited, and he might lose his mind at any time, so he decisively found the right time to shoot him dead.

After controlling the scene, Lao Ji rushed up to ask Chen Song about Sister Xi's location, and Chen Song panicked and said upstairs. Lao Ji hurriedly rushed to the second floor and rescued Sister Xi who was about to suffocate in time....

End of this chapter