Mystery case, chase the murderer.

Who is the murderer and where is he?

Here in Ningzhou City, the serious crime team and the criminal police team are still continuing to investigate the case, and everyone has regrouped and given up the idea of solving the case in a short period of time.

This time, we must admit that the Serious Crime Unit has indeed encountered a difficult problem, an extremely difficult murderer.

The Serious Crime Unit is not a god, and not all cases can be solved within 48 or 72 hours. When you encounter something you can't figure out, you will also have a headache; When encountering people who need a lot of investigation, they also need to go door-to-door; When encountering a case, it also takes day and night overtime to solve it.

All because the police are also people.

All the members of the Serious Crime Team, especially me, have readjusted their mood and overturned all the clues and investigation results that they had before.

Let the time go back to the moment when Du Tan was just killed, rethink, and re-investigate.

Du Tan, the first deceased in this case. After attending a class reunion, he returned home and was killed by the murderer by stabbing him in the throat with a baguette, causing vomiting and suffocating the vomit into the trachea.

Suspicion: The murderer was also one of the members who attended the class reunion, and the murderer sent the drunk Du Qin home, and after killing him, he carefully cleaned up the crime scene, leaving no fingerprints and footprints. But through the investigation of the surveillance video, Du Tan went home by himself, and no one sent him.

Xu Kuan, the second deceased in this case. On the third day after Du Tan's death, he was crushed to death by the wall of the rooftop wall that fell from a high altitude.

Suspicion: The murderer was found on the rooftop with a footprint wearing a shoe cover, the footprint was very vague, forty-two yards, and according to the footprint examination, it was proved that the murderer was a man. Moreover, the murderer's method of destroying the wall was to use the highly corrosive sulfate corrosion to damage the roof wall, so as to complete the killing. Xu Kuan's backpack contained a brand-new unopened mobile phone, so the police speculated that he came to deliver the mobile phone to the buyer, but the police did not find any possible contact numbers in Xu Kuan's social software and mobile phone card address book, nor did they find any money exchange records.

Hu Yuanling, the third deceased in this case, died of cardiac arrest caused by a drop in blood pressure six days after Du Tan's death.

Suspicion: After police investigation, it was found that the multivitamin capsules in her backpack were artificially replaced with antihypertensive drugs, which led to Hu Yuanling's death from long-term overdose of antihypertensive drugs. However, the police did not find any fingerprints and footprints of the murderer at the scene of Hu Yuanling's death, which indicates that the blood pressure medicine was most likely replaced when she attended a class reunion.

Liu Huiqin, the fourth deceased in this case, died of a lung infection caused by a severe pollen allergy seven days after Du Tan's death.

Suspicion: The murderer knew that Liu Huiqin had a serious pollen allergy, so it can be concluded that the murderer knew Liu Huiqin very well, and it was very likely that Liu Huiqin was a student. Liu Huiqin knew that Du Qin and Xu Kuan were killed, but the murderer was the one she would not suspect the most, but the murderer wore gloves and shoe covers to give gifts to Liu Huiqin, and the murderer did not enter the house, which did not conform to the common sense of students coming to visit the teacher.

Yao Xun'an, the fifth deceased in this case, died in a car accident nine days after Du Tan's death.

Suspicion: The location of the crime is not in Ningzhou City, and the suspects locked by the police are all in Ningzhou City, and there is no time to commit the crime. If it is suspected that the murderer bought the murder or committed the crime by a gang, it cannot be ruled out that the murderer is not on the list of suspects locked by the police.

Today is the ninth day after Du Tan's death, and it is also the seventh day that the serious crime team has taken over and started the investigation.

It's been a week, and the murderer has been killing people, and the murderer has not been brought to justice.

In the office of the Serious Crime Unit, the analysis of the case continues.

"At present, it is certain that the murderer is completing a revenge murder plan, and the target of revenge is the 'Seven Dragons and One Phoenix' school bullying gang. As for Liu Huiqin, she must have some inextricable relationship with school bullying, so the murderer will complete the killing. I pondered for a moment and said slowly.

"Maybe we've always thought about the motive for killing too much. In many egregious random homicide cases, the murderer has no motive to kill at all, and everything is to satisfy the murderer's own perverted psychology. Li Meng looked at me seriously and said lightly.

She was right, we were always looking for a reasonable motive for the killing, and it seemed that there was no particularly plausible motive for the killing, and the murderer was eliminated by the police.

"So, since we've decided to overturn everything and start over again, we have to think differently. All those who meet the conditions for committing the crime are listed as suspects for key investigation. Xue Hang looked at us and said in a deep voice, helping us adjust our state and determine the direction of the investigation.

"Does Chu Ming still re-investigate? The Interpol team is still watching him 24 hours a day, and he has just finished a polygraph interrogation. Lin Zifan thought about it and suddenly asked us.

I pondered for a long time, and then made up my mind: "Continue to monitor him until all his information is clear." ”

Because until now, I still doubt Chu Ming.

It's just that I don't have any evidence.

In the following time, the long investigation and visit mission began.

Fortunately, the colleagues in various departments were helpful enough and did not make us wait too long.

Soon investigated all of Chu Ming's information.

Chu Ming, male, 26 years old, native of Ningzhou City. With a junior high school degree, he studied in Sunflower Preschool, Ningzhou No. 1 Experimental Primary School, and Ningzhou No. 1 Experimental Middle School. After graduating from junior high school, he did not continue his studies, but left Ningzhou City to make a living, working as a hotel waiter, security guard, courier and so on.

In recent years, he has returned to live in Ningzhou City and has been living in an old house.

His parents divorced when he was in preschool, and both parents restarted their families and no longer live in Ningzhou. The parents never asked about Chu Ming's life, and they didn't even go back to see Chu Ming for so many years, they just regularly sent money to a fixed bank card.

Chu Ming has been living with his grandmother, and his grandmother also passed away after he graduated from junior high school, so Chu Ming did not continue to go to school and entered the society ahead of schedule.

Everything seemed to be free of any problems.

However, the household registration department soon investigated that Chu Ming was not an only child, but had a younger brother named Chu Liang.

The household registration department immediately sent Chu Ming's information to the serious crime team, but there was nothing except Chu Liang's ID card information.

The only thing that proves the existence of Chu Liang is that he also studied in Ningzhou No. 1 Experimental Primary School, but he is not in the same class as Chu Ming.