At half past five in the morning, we received a call to the police, and fifteen minutes later, after learning about the scene, we walked into the scene of the crime.

In the living room lies a female corpse, wearing pink summer short-sleeved shorts and ice silk pajamas. His clothes were intact, his chest was stained red with a large patch of blood, and his face and neck were smeared with blood.

"The mortis of the upper limbs is already very severe, and the death is at least more than three hours. However, the drop in body temperature was not severe, and the time of death did not exceed six hours. Ren Qiushi said in a deep voice.

Zeng Lan looked at his watch: "It's five fifty o'clock, so the time of death is from half past eleven last night to half past two this morning." ”

"The pineal gland in the human brain secretes a substance called Merlottonine, and the degree of secretion of this substance changes with time, light, day and night, especially from 12 o'clock at night to 2 o'clock in the morning, when it secretes the most, so people will feel the most sleepy at this time. Since the murderer chose to break into the house to commit the crime, he will definitely choose this time. Ren Qiushi said seriously.

"So you judge the time of death to be between twelve and two?" Zeng Lan looked at Ren Qiushi in a daze.

Ren Qiushi pondered for a moment: "The time of death should be around two o'clock in the morning, but it still has to be subject to the autopsy." ”

Next, what Ren Qiushi and Zeng Lan want to determine is the cause of death.

Judging from the circumstances of the body and the circumstances at the scene, the deceased died by being stabbed in the chest with a sharp blade. Ren Qiushi soon noticed that something was wrong, because there was a very obvious strangulation mark on the deceased's neck, a bloody handprint, and there were also rubbing-like blood marks on his face.

This shows that the murderer first stabbed, then strangled the neck, and covered the mouth and nose of the deceased.

"Take a picture to fix this strangulation." Ren Qiushi looked at the technical team officer beside him and beckoned.

The police officers of the technical team held a professional criminal investigation camera, changed the direction and pressed the shutter on the bloody handprint on the neck of the corpse, and there was a clicking sound at the scene, and the flash kept flashing.

Jiang Tingbai also walked to the corpse, squatted down and looked at the bloody handprint carefully, frowned and said: "There are no palm prints and fingerprints, only the direction of the thread, the murderer is wearing gloves, but not disposable rubber gloves, but cotton nylon gloves or polyester gloves." ”

Ren Qiushi nodded, agreeing with Jiang Tingbai's opinion: "It is a very common labor protection glove. ”

"The killer used this kind of glove to break into the house, and it didn't look like a repeat offender." Jiang Tingbai stood up and looked at the placement of items in the living room.

The layout in the living room is very simple, but there are obvious signs of rummaging through objects, and the recovery of objects after rummaging is very rough.

"Burglary murder?" Li Meng asked directly.

Jiang Tingbai nodded first, and then shook his head: "Judging from the current situation, this is the case. The killer rummaged through the living room, and we found an empty wallet, so the killer must have committed a theft. But the theft was confined to the living room, the murderer did not enter the room, and the money, gold and silver jewelry, and a diamond necklace of the deceased were not lost in the room. ”

"This is obviously a novice, just want to steal some money and spend money, and after being discovered by the owner of the house, he killed people with passion, and then because of his poor psychological quality, he didn't dare to enter the house to continue stealing, and ran away." I said in a deep voice.

"Section Chief Jiang, the murder weapon was found at the scene!" A police officer of the technical team said to Jiang Tingbai.

"The murder weapon? Where is it? Jiang Tingbai frowned suddenly, and hurriedly asked.

The technical team officer pointed to the TV cabinet: "Below." ”

Jiang Tingbai walked to the TV cabinet, lay on the ground, his face on the ground, and found a blood-stained folding dagger inside the TV cabinet.

"It seems that this stupid thief accidentally kicked in when he was looking for something in the dark. Take it out, fix the physical evidence, and see if there are any fingerprints. Jiang Tingbai stood up and said seriously.

"Yes!" The police officer of the technical team took out a physical evidence identification plate and put it on the ground, then took out the folding dagger, took pictures and fixed it, and put it in the physical evidence bag.

After a while, Ren Qiushi suddenly opened his mouth and echoed a sentence, and said to us: "That's right, he is indeed a stupid thief, and he must have no previous convictions before, this should be his first time stealing and killing people." ”

"Oh? Aren't you a medical examiner? How did you judge this? I looked at him curiously and asked puzzled.

"Corpses." Ren Qiushi said coldly: "The corpse told me." ”

Subsequently, Ren Qiushi explained to me seriously: "The circumstances of the crime at that time should be like this, the murderer burglarized and happened to meet the deceased who got up at night. When the two met, the murderer immediately stabbed the deceased with the dagger he was carrying, and the deceased fell to the ground in pain. But the stab was not deep, and it did not kill with one stab.

Subsequently, the killer continued the theft in a panic. It was precisely because the knife did not kill with a single blow that the deceased then woke up. In a panic, the murderer stepped forward again and strangled the deceased's neck with one hand and covered the deceased's mouth and nose with the other, so the deceased's neck and face were wiped with blood. ”

"So what is the cause of death?" I looked at Ren Qiushi and asked.

"Suffocation." Ren Qiushi said lightly.

"Burglary, murder of passion." I thought about it, and suddenly asked Lin Zifan: "Did the murderer come in from the gate?" ”

Lin Zifan walked up to me and said seriously: "The murderer should not have come in through the gate, after the deceased's sister called the police, we arrived at the scene, and the door was locked." And because of the fact that the door was locked, I specifically asked the deceased's sister. Because she had a nervous breakdown and was insecure, the door was locked every night. And after she called the police, she has been hiding in the bedroom and has not touched the door. ”

"You mean, the door was locked all night and never opened?" I asked earnestly with a sudden frown.

"Yes." Lin Zifan nodded vigorously.

"Didn't you come in through the door? Did you come in through the wall? Flying cornices and walking on the wall? That's 50 floors. After listening to Lin Zifan's words, I felt even more confused.

"Fifty stories high, the murderer climbed the wall and came in to steal? This kind of theft has a strong purpose, and it is obviously aimed at the deceased's family, are you sure that it is still a novice thief? "Li Meng stood beside us and felt that these clues were a little inconsistent.

Xue Hang had been thinking about this matter all along, so he stood by the window during the entire on-site investigation and inspected every window.

If there is a drainage pipe outside the window, theoretically speaking, it is completely possible to climb up from the drainage pipe, at least, Xue Hang can climb with his bare hands, and fifty floors are not a problem.