criminal mentality

Chapter 71 The Black Hand in the Mist
Every year, the Criminal Psychology Research Office sends staff to prisons in various provinces to conduct psychological assessments. This year, Wenmo's task is Beibao Prison in L City. On the day she arrived at the prison, Zheng Muyang was found dead in her cell.

The health doctor in the prison, Lu Moli, rushed to the scene as soon as she received the news, and saw that Zheng Muyang was already stiff, and it was obvious that he had been dead for more than five hours.

Forensic doctor Lin and the criminal police team then rushed to Beibao Prison.

The preliminary autopsy of Lin's forensic doctor concluded that the deceased should have died of poisoning. When the corpse was carefully examined, a scar left by a dotted syringe needle was found on the left shoulder of the deceased. The wound showed no signs of healing, and it should have been formed during the time of death.

In fact, the death rate of prisoners in our country's prisons is still very low, and most of them died of sudden diseases, and murders were rare. Therefore, Wen Mo did not rush to work, but followed the local criminal police, paying attention The progress of the murder case.

Zhang Shaowen looked at the intellectual beauty in police uniform who had been following them all the time, and his saliva almost flowed out.Speaking of which, the Public Security Bureau is really almost a temple for monks. The only female police officers either look exactly like a famous prehistoric animal, or they are small chili peppers like Yu Jie, who will suffer from indigestion if they eat too much.Because seeing such a quiet and beautiful colleague, even if she looks a few years older than herself, what does that matter?Not everyone has the love of beauty.

"Hi, beauty, are you a prison guard in this prison? I'm from the criminal police team of L City Public Security Bureau. My name is Zhang Shaowen. What's your name for a beauty?"

To be accosted in a place like a prison.Looking at this big boy in front of him who is no more than 25 years old, he is neatly dressed, he looks cleaner than anyone else, he still has a faint smell of Lysol on his body, his fingernails are clean and a little pale, and he keeps winking at himself, Wen Mo smiled helplessly. Boys nowadays are not reserved at all. There is a dead man lying on the ground, so they are free to chat with themselves?And it's too unprofessional, right?In a prison full of male prisoners, except for the doctor who may be a woman, there is no second woman to come, right?Didn't you see the doctor standing next to him in a white coat?How could you think she was a prison guard?
Seeing that Wen Mo didn't answer him for a long time, Zhang Shaowen once again used his thick-skinned word-wrapping formula: "Beauty, beauty, let's talk, it's fate to meet each other, right? Anyway, we don't know about the autopsy, so we just need to stay aside for a while." Just wait for our boss to assign tasks. Now you are idle, and I think you are quite boring, and you will feel bad when facing these prisoners every day in prison. Look at a handsome guy like me, how nice."

Wen Mo took a deep look at him, the meaning was very clear, don't regret it later.Then, without waiting for Zhang Shaowen to say anything else, he went directly to Liu Zhenliang who was wearing the captain's uniform, showed his ID, and asked to participate in the investigation of the case.After obtaining Liu Zhenliang's permission, Zhang Shaowen was given a task that made him almost rub himself off and didn't eat for three meals: carefully inspect every inch of the cell, find out whether there are hidden illegal objects, and search the area. , including the sewer pipe of the toilet bowl
Liu Zhenliang looked at Wen Mo appreciatively. This woman from the National Security Bureau is really accurate. Zhang Shaowen is a bit of a clean freak. He usually has to wash his hands three times after cleaning his desk. Let him dig out the urinal drain. Take his half life?
Wen Mo's bad taste succeeded, seeing Zhang Shaowen staring blankly at the toilet in the cell with a blank face, he couldn't help but feel good.

The body was quickly taken away by the forensic doctor Lin. Liu Zhenliang was questioning Kang Baoping who found the dead. He Xinxin was talking to another prisoner, Cai Pengcheng. Watching people playing cards, they didn't come back together until the lights were about to turn off. When they came back, they saw Zheng Muyang lying on the bed.

As he was about to be released after serving his sentence, Zheng Muyang became more and more excited. He hadn’t slept a full night for several days in a row, and he often tossed and turned in the middle of the night. They were all asleep in bed.

After an autopsy, the forensic doctor deduced that the deceased Zheng Muyang died between 7:10 and [-]:[-] last night. The cause of death was cardiac arrest caused by excessive intake of potassium chloride. The wound tissue section found on the left shoulder of the deceased had a high concentration of potassium chloride.The murder instrument is a small syringe.

Knowing the cause of death of the deceased, Liu Zhenliang and the others have a specific direction for their investigation.Potassium chloride may be difficult to obtain in other prisons, but it is very simple in North Fort, a prison where prisoners are relatively free, because potassium chloride is the largest by-product of the salt factory, although the prison will also take There are some measures to prevent prisoners from being taken out, but as long as there is a heart, there will always be a way.

The salt factory is located in the southeast corner of the prison, with barbed wire fences on three sides and the sea on one side. In the salt factory, there are many white precipitated crystals under the heating and cooling facilities that can be seen everywhere.

Anyone who has studied high school chemistry knows that the water solubility of potassium chloride increases with the increase of temperature, and the growth rate is very large, while the solubility of sodium chloride is hardly affected by temperature.Therefore, the common method for extracting the two compounds from seawater is the cooling precipitation method.Heating the solution to a certain temperature, and then cooling it rapidly, the precipitated crystals are very pure potassium chloride, and then heating the remaining solution until the water evaporates, and the salt is obtained.Therefore, traces of potassium chloride can be seen everywhere in the salt-making workshop, and anyone who takes a little while people are not paying attention is nothing at all.It is impossible to trace the murderer from the source of potassium chloride.

What made Liu Zhenliang even more angry was that there was a camera outside Zheng Muyang's cell, which could clearly capture every move of several nearby cells. When they asked to retrieve the surveillance video, they were told The camera broke the other day.

Wen Mo led a few prison guards to search through the garbage collected by the prison this morning to be shipped out, and found seven syringes. The forensics department quickly found out that a high-concentration potassium chloride solution remained in one of the syringes.

The medical records of the inmates in the prison infirmary are very detailed, and it is clear at a glance who came to the infirmary at what time and for what reason.There were only seven syringes used yesterday, six of which were used in the infirmary, and were thrown into the medical waste bin after use, and the only exception was in cell 305 in Zone A The cell used was only 15 meters away from Zheng Muyang's cell.

Dong Wanfu, a prisoner receiving injection therapy, came into the sight of the police.

(End of this chapter)