There are three continuous processes in the euphoria experience of drug addicts, which are the intense euphoria period, the relaxation state period, and the energetic period.

As the name suggests, the period of intense pleasure refers to the intense pleasure that drug addicts experience immediately after using drugs, which spreads from the lower abdomen to the whole body, and is generally accompanied by skin redness and itching, but this feeling is not uncomfortable, but it is very comfortable to scratch.

In the relaxation period, the negative emotions such as nervousness, anxiety, annoyance, and fear of the drug addict all disappear, and are replaced by warmth, tranquility, comfort, accompanied by pleasant fantasies and hallucinations.

Drug addicts who enter the refreshment period often feel good about themselves, full of energy, and seem to be more productive. However, with the increase of drug use time, the tolerance gradually increases, and the pleasure of the drug addict will become less and less, at this time, it is necessary to increase the dose of smoking, and then it will change from smoking to injection, and the withdrawal symptoms will become more and more serious.

There are many dangerous things in life that cannot be easily tried out of curiosity or impulse, and drug use is the most undesirable of these things.

Xia Shi was very glad that the girl sitting next to him was not dragged into this endless abyss by her friends, because the mechanism of action of heroin has not yet been fully understood, so far there is no effective way to quit, and the rate of relapse is extremely high, once it is contaminated with this kind of thing, it is almost impossible to completely quit.

Ma Zhichen was exposed to heroin through his fox friends many years ago, and made an irreparable mistake because of it. Fortunately, he smoked for a short time, and after nearly three years of hard work, he basically returned to a normal life. But who would have thought that bad luck would befall him this time.

Xia Shi asked Yu Ying, "In addition to these hidden in your house, how many drugs Xiaocan still has in his hands, do you know?" ”

"I don't know how much she stole from her eldest brother, but there should be some left, or she'll come to me to pick up the goods."

"On the night of September 26th, when the two of you met at the bar, did Xiao Can look like something was wrong?"

"There have definitely been some changes compared to before before the drug use, both physical and emotional, but overall the changes are not particularly significant."

"Does Xiaocan take drugs with others?"

"I don't know, she never told me. However, if she can encourage me to accompany her, she will probably encourage others as well, I guess for sure. ”

"So, about Xiaocan's gangster brother, he ......" Before Xia Shi's words were finished, there was a sudden knock on the door outside the corridor. Yu Ying was taken aback, looked at Xia Shi in confusion and asked, "Who is here?" ”

"Don't be afraid, it's the handsome guy who was drinking with you at the bar just now."

"He's a cop too?"

"Sort of." After Xia Shi finished speaking, he got up and went outside to open the door for Gu Song.

After a while, Gu Song followed Xia Shi into the bedroom, and saw Yu Ying sitting on the edge of the bed with red and swollen eyes, only a bath towel wrapped around her body, and her hands were still handcuffed together, looking pitiful, he couldn't help but tease Xia Shi and said, "Team Xia, I didn't expect you to like to play this, and even use handcuffs?" ”

"Get out!" Xia Shi glared at Gu Song viciously, not in the mood to talk nonsense with him, and returned to the book and preached, "You heard the situation on my side from your mobile phone. Judging from the current situation, the drugs that Ma Zhichen took were probably provided to him by the girl named Tang Can, and Tang Can's eldest brother, the gang boss, is the suspect we are looking for. ”

"Yu Ying, what is Tang Can's eldest brother's name? How can we find him? Gu Song asked after Xia Shi was interrupted.

"Xiaocan's eldest brother is called Tang Xun, I don't know where to find him. I've known Xiaocan for almost two years, and I've never met her brother in person, and I only listened to her when chatting. ”

"Are the two of them brother and sister?"

"Yes, Xiaocan's eldest brother is more than ten years older than her and loves her very much, almost like her father."

"Is there really no way for you to contact Tang Can? You always know where she lives, right? ”

Yu Ying sighed deeply and replied very helplessly: "To be honest, I'm also worried about Xiaocan's safety, I don't know why she didn't reply to my message." If it weren't for her big brother, I would have gone to her a long time ago. If you want to go to her house, I can take you there now. ”

Gu Song and Xia Shi glanced at each other, the latter nodded slightly, took out the key to open Yu Ying's handcuffs, and urged her: "You hurry up and put on your clothes, we have to go to Tang Can's house to see the situation." To tell you the truth, we suspect that Tang Can may have encountered some kind of danger. ”

Half an hour later, the group of three walked through the dark night and came to the downstairs of the residential building where Tang Can's house was located. Yu Ying looked up at the window on the eighth floor, where it was also pitch black.

At half past twelve in the morning, Xiao Can may have fallen asleep, Yu Ying comforted herself, perhaps, she was indulging in a carnival in some unknown place, or perhaps, she was still busy with her work...... Anyway, Yu Ying only hopes that Xiaocan will be safe. However, seeing the two serious-looking police officers beside her, she realized the seriousness of the situation no matter how stupid she was.

She took out her mobile phone and dialed Tang Can's phone again, and there was still the prompt tone on the phone, "I'm sorry, the phone you dialed has been turned off". She shook her head in frustration and said, "No, Xiaocan's mobile phone still can't get through, let's go upstairs directly." ”

knocked on the door for a long time, and no one in the room responded, which was not unexpected by Gu Song and Xia Shi. They even thought that Tang Can might have left here a long time ago and would never come back.

"Call someone from the technical team to open the door, this kind of lock requires special tools to open." Gu Song studied the door lock and said to Xia Shi, "By the way, Forensic Doctor Chen and Ruonan are also called, I suspect that something bad has happened here." ”

Hearing Gu Song say this, Yu Ying finally couldn't hold back the confusion in her heart, pulled Xia Shi's clothes and asked, "Officer Xia, can you tell me what happened to Xiaocan?" You shouldn't just be investigating her brother's drug trafficking, right? ”

Xia Shi replied truthfully: "It is inconvenient for us to disclose the specific situation to you, but we seriously suspect that Tang Can's eldest brother is involved in a murder case, and we must find his whereabouts as soon as possible." If you have any clues that we can provide to help us solve the case, we will reduce the punishment for your previous mistakes as appropriate. ”

Later, the technical team opened the door of Tang Can's house and conducted a very detailed survey of the room inside. At the same time, through the review of the surveillance video of the community (including elevator monitoring), it was confirmed that Ma Zhichen followed Tang Can home at about 11 pm on September 26.

However, the ensuing series of events began to turn spooky.

At more than two o'clock in the morning on September 27, the elevator surveillance captured the picture of Ma Zhichen leaving. Ma Zhichen in the video looked panicked, unable to give up, and seemed to be in a state of extreme fear. If it weren't for the side effects of drug abuse, it would probably be that he had experienced something terrible in Tang Can's home, which made him have to flee from that place of right and wrong.

Perhaps it was from that moment that Ma Zhichen lived a life of worrying all day long and not being able to return home. He would rather mess around with the criminal police team and be put in custody than get involved in some deadly trouble.

According to Yu Ying, Tang Can's mobile phone was turned off after that night, and she couldn't be contacted after that, so it can be speculated that something unexpected should have happened after Tang Can and Ma Zhichen went home, causing Ma Zhichen to flee in a hurry and Tang Can "lost contact". Considering that the two people were likely to take drugs together at home, the final conclusion should be: Tang Can may have an accident or even die in the process of taking drugs, Ma Zhichen was afraid of taking responsibility, so he chose to run away.

He probably knew that Tang Can's eldest brother was the black boss, and once this matter was discovered by Tang Can's eldest brother, he would definitely die, and he would die a very ugly death. In desperation, he had no choice but to go to the criminal police team to seek protection from the police, but because he had also committed an unforgivable crime, he did not dare to truthfully confess the truth of the matter, so he used He Yao's death as a pretext to pretend to be the murderer of the "9.16 case" and let the police put him in the detention center for asylum.

Through the eye of the needle on Ma Zhichen's arm, it can be imagined that the drug use method taken by the two people that night was subcutaneous injection, which is a more dangerous way than smoking and scalding, and once the dose is not well mastered, or there are some problems in the drug addict's own physical condition, it is likely to endanger the life of the drug addict.

If the above assumptions are true, Tang Can suffered an accident because of his drug use with Ma Zhichen, then Tang Can's eldest brother Tang Xun undoubtedly became the number one suspect in the murder of Ma Zhichen.

If you continue to check the surveillance, you will find that on the evening of September 27, that is, seventeen hours after Ma Zhichen left Tang Can's house, three men who were not good at facing walked into the elevator, and the target floor was the eighth floor where Tang Can's house was located. One of them, a man in his thirties, was tall, burly, and had a majestic look, giving him a sense of status.

Although Gu Song had never seen Tang Can's eldest brother, as soon as he saw the appearance and temperament of that man, he immediately guessed that this person was the Tang Xun they were looking for. And the other two men who followed Tang Xun should be his horses.

The three men stayed at Tang Can's house for more than an hour, dragging a large suitcase that had not appeared before as they left. Gu Song froze the surveillance footage here, pointed to the suitcase on the screen and said to Xia Shi: "Tang Can's home has been carefully cleaned, and no suspicious items such as drugs and syringes have been found at the scene, and Tang Can's whereabouts are still unknown." I suspect that nine times out of ten, the box contained Tang Can's corpse. ”