Attending ex-girlfriend's wedding, arresting the groom's officer on the spot

The crime scene was a self-built house. The room was not large, only about 40 square meters.

There are about ten self-built buildings at No. 127 Songjiang Road. They have not been demolished and many tenants live here.

When the police were called, the victim's information had been basically confirmed and the deceased was a tenant here.

"Team Qin, the person who rents the house is named Zhang Xiaotian. He is a young man among the four victims. The other three, the young woman is Zhang Xiaotian's sister, and the other two are Zhang Xiaotian's parents."

The landlord is now accepting inquiries from Zhang Hui outside.

"When did Zhang Xiaotian rent a house here?"

"Last March."

The landlord was a middle-aged man. He found the victim dead and it was the landlord who called the police.

"I rented my house to him for 800 yuan per month. The agreement was that I would deposit one and pay three. He has not paid me the rent this quarter. I came over today to take a look. Unexpectedly, when I opened the door, I found several people. All dead."

The landlord's face was pale now, and his words were a little unreal. He was obviously frightened.

"Does Zhang Xiaotian usually live here alone or is his family here?"

"Alone, but not at the beginning. Last year, he lived here with another man for a while, and then the man seemed to have moved away. After the Chinese New Year this year, Zhang Xiaotian has been alone here. Live here."

"Do his parents come over often?"

"Come here once or twice, usually on weekends. His parents are also working in Haizhou City. Their whole family is working here, but I don't know the specific situation. I heard him say it when chatting with his father. Got up."

"Do you have any information about the man who lived with Zhang Xiaotian last year?"

"Yes, yes, when they lived there, according to the current requirements for renting a house, they had to register their ID cards. I have copies of their ID cards."

"It's upstairs, I'll get it for you now."

Outside, other members of the criminal police team were also questioning other tenants in the building.

"I didn't hear anything last night. I was too tired from work, so I slept very hard when I came back."

"His parents came here yesterday afternoon. I've seen them before. Usually they stay here overnight, but they didn't seem to hear anything last night."

"Our monitoring is not good, they are all broken, and the landlord won't pay to repair them. We have told him many times."

"Zhang Xiaotian seems to work as a repairman in a car 4S shop. We don't know the details. He comes back late most of the time and doesn't like to communicate with us."

"I think it was the man I was with last year who did it. You don't know, they are gay."

"When that man moved out last year, he almost got into a fight with Zhang Xiaotian and the two of them. Things inside were smashed so hard that I heard it from the next door."

Most of the information from interviews and surveys is of little use.

In real life, everyone lives their own life, and few people have the leisure to worry about other people's affairs, so most people cannot provide any valuable clues.

But Zhang Xiaotian's neighbors still know a little more information.

According to the information provided by the other party, Zhang Xiaotian is likely to be gay, and the man who lived here with him last year is his partner.

A few minutes later, Zhang Hui got a copy of the ID card of the man who lived with Zhang Xiaotian last year.

Wang Junshan. "Check where this person is now."

While the investigation was going on outside, Lu Chuan's on-site survey was also continuing.

Because the floor of the entire room was basically covered with a layer of blood, Lu Chuan and Lao Yang first laid some survey treads when they came in, so as to minimize damage to the site.

Under normal circumstances, blood can clot within 3 to 15 minutes after it leaves the body.

If the amount of bleeding is relatively large and the blood accumulates, the coagulation time after injection will be slightly longer, but it will not exceed 30 minutes.

Blood coagulation is a coagulation function inherent in the blood itself.

Normally, when the body suffers accidental injury and causes bleeding, the blood will coagulate within a short period of time.

Because there is a substance called thrombin in the blood, thrombin is in an inactive state under normal circumstances.

But when blood flow speed increases and blood vessel permeability increases, this thrombin substance will be activated to form thrombin and then produce fibrin.

This kind of fibrin will form a layer of mesh-like material on the outside of the damaged blood vessels. This mesh is relatively small and platelets cannot pass through it. When platelets fill the mesh, blood clots will form, preventing the blood from continuing to flow out.

Normally everyone has this coagulation function, but a small number of people are born with coagulation dysfunction. After the body is injured and blood flows out, the blood coagulates very slowly, which requires special methods to stop bleeding.

However, the body's autocoagulation function has a certain range.

The blood vessels of the human body are divided into arteries and veins. Many of the arterial blood vessels are deep in the skin surface, while most of the blood vessels on the skin surface that can be observed by the naked eye are actually venous blood vessels.

Most of the coagulation function can work after the veins are damaged. Generally, if the arteries are damaged, the coagulation function cannot successfully prevent the blood from flowing out.

After four people died at the scene, blood coagulation was different from normal coagulation. After a large amount of blood was ejected, the thrombin in the blood itself was not fully activated.

Instead, they are activated one after another during the injection process, so some blood coagulates quickly and some blood coagulates slowly.

Of course, the blood at the scene that Lu Chuan and others saw now had basically solidified, and it should have been about 5 to 6 hours since the victim died.

Of the four people on the bed, two of them had their carotid arteries cut off with a sharp instrument, causing massive bleeding and leading to death.

Two others were stabbed in other parts, resulting in death.

The deceased whose carotid arteries were severed by a sharp instrument were two men, one middle-aged and one young.

Two women were on the ground. The young woman was stabbed to the abdomen and died, and the middle-aged woman was stabbed to the chest and died.

"There were signs of a struggle."

Yang Sen pointed to the two dead women on the ground.

The two men were fatally struck with one blow, and there was basically no sign of resistance. However, the two women had scratches and bloodstains on their bodies and hands, and the signs of struggle were obvious.

Lu Chuan nodded: "There are traces of scrubbing on the bloodstains beside the bed. The murderer was most likely injured during the struggle and may have left bloodstains."

Liu Guodong walked to the spot where the bloodstains were being scrubbed, and he observed: "It seems that the other party just rinsed it with water?"

"No dish soap?"

"Probably not. I'll wipe some off and do some identification later. If the murderer really bled, we can compare the DNA information." (End of Chapter)