A little girl was walking alone on the street, covered in blood and at a loss, when people nearby found the little girl in a residential area. The little girl was already frightened, and her identity could not be confirmed. The police found dirt on the sole of the little girl's shoe, and the test report showed that the chemical composition of the powerful herbicide was in the soil. It is likely that the lawn of the little girl's house is being renovated.

According to this, the police dispatched a helicopter to quickly lock down the little girl's home, and Lao Ji rushed to the crime scene, leaving a row of blood-colored footprints at the door. After the police entered, they found that a tragedy had just occurred here, the victims were Cheng Ming's family, and all six members of the family were killed except for Cheng Ming and his youngest daughter Linlin.

Xiao He found no traces of forcible invasion around the house, and Cheng Ming still had a breath when he was found, and kept saying: "It's my son." The eldest son lay not far from the door, and the six-month-old brother lay in his arms, already dead. The mother was sitting on the couch with a large hole in her jaw with a shotgun open, and the body of the second son was found in the room. He had a wide gunshot wound to his back.

After investigation, the father and son were both shot in the back, and only the mother was shot in the jaw, and her wounds were consistent with suicide gunshot wounds. The police seriously suspected that the child's mother was likely the murderer, and she killed the entire family before committing suicide. But the bottom of the little girl Linlin's feet was stained with other people's blood, which showed that she was also in the house at the time, why was she the only one who escaped this catastrophe?

There was a freshly heated baby bottle in the microwave and a half-eaten bag of fries and burgers next to it. Combined with the condition of the body, the police preliminarily judged that the time of death of the deceased was around 12 noon. This is very likely to be committed by an acquaintance, and Xiao He collected the hair on the bed in the master bedroom, and he also found a jar of antidepressants that he had not taken. It shows that this is the medicine prescribed by Cheng Ming's wife three weeks ago. The DNA test results of the hair showed that it was the hair of Cheng Ming's sister-in-law, who told the police that she often went to her sister's house to talk to her, and that her hair was left over from the previous accommodation, and that she was on a business trip that day, and she had an alibi. The sister-in-law revealed that her sister did not take antidepressants because she was afraid of adverse effects on the baby, and she loved their children very much. On the contrary, his brother-in-law Cheng Ming is not, he puts all his heart and soul into his work, leaving the responsibility of taking care of his four children to his wife.

Cheng Ming was rescued, and Cheng Ming said to the police: "At noon, his wife called him and asked him to rush back, she can't take care of the four children by herself." When he rushed home, he found his son lying on the ground, when someone shot him in the back, and all that was left was the sound of Xiao Linlin crying. The police tried to restore the fingerprints on the shotgun and the bottle with a unique drug, but found that there were no visible fingerprints on the shotgun, and the fingerprints on the bottle belonged to the second son. Why isn't it the mother who takes care of the child? The police made two assumptions, it was possible that she was opening a gun safe and preparing to kill someone, or she could be looking for Linlin, who was hiding. Officers re-investigated Cheng Ming's home, and they found a bloody blanket in the kennel outside. The DNA test showed that it was the mother's blood, and there was no dirt or herbicide on the blanket, which indicated that someone had taken Xiao Linlin to the kennel. And the blood stains on the soles of Xiao Linlin's feet were stained by her later when she returned to the house.

Lao Ji checked the shoes of Cheng Ming's family and found that only the shoes of the eldest son had herbicides and soil on them. This shows that when his mother died, the eldest son was still alive, and it was he who hid Xiao Linlin in the kennel. The killer was not the mother, it was a murder case. Combining the results of all the investigations, the officers tried to reconstruct the crime scene at that time. When the eldest son returned from buying burgers and fries, he found that his mother had been killed, so he took his sister and hid her in the kennel. At this time, the murderer went to the room and killed the second son, and when the eldest son came back and wanted to escape with the younger son, he was shot by the murderer in the corridor. Cheng Ming, who came back, was also attacked from behind by the murderer and knocked to the ground.

At this time, Lao Ji suddenly found that the clothes on his younger son's body were a little strange, with the younger son's own blood on the collar, the eldest son's blood on his arms, and the mother's blood in front of the clothes. And Cheng Ming's blood stains are next to the collar. Lao Ji said that it was strange here, it was a drop of blood. Lao Ji found Cheng Ming, but Cheng Ming didn't know why he left blood stains on his youngest son. He said he had been shot, possibly from a splash. Lao Ji retorted to her, but the blood stains were in the shape of dripping, and she was standing next to her youngest son at that time. The eldest son died in order to protect the younger son, and Cheng Ming was not necessarily, it was probably the eldest son who found Cheng Ming who committed the murder, and after a fight, the eldest son snatched Cheng Ming's gun. Cheng Ming saw that the situation was not good and wanted to use his younger son to blackmail his eldest son, but the eldest son stopped him, and the eldest son thought that Cheng Ming would not kill him holding his younger son, so he ran away from the door, who knew that Cheng Ming pulled the trigger without hesitation after regaining the gun. Cheng Ming could only obediently get into the police car, and he said to Lao Ji: "The child is so noisy that he can't sleep at all, and even hallucinates at work, he can't stand it anymore, and feels that he can't face them anymore."

Lao Ji was keenly aware that Cheng Ming was confused, and he did not directly admit guilt, he wanted to lay the foundation for the defense of the court at the back door. And this is very likely to succeed, Lao Ji doesn't want Cheng Ming to escape the punishment of the law. He checked the handle of the safe and found that there was ammonia on it, and Cheng Ming's clothes also had it. Lao Ji speculated: Cheng Ming called his wife to check the gun safe, and let his wife's fingerprints remain on the handle of the safe, but he himself took protective measures, he wanted to frame his wife, which shows that Cheng Ming was sober at the time, and he had already premeditated.

The local area quickly reported the case, and sure enough, Cheng Ming said in court that he had postpartum depression and killed people by mistake because of his consciousness disorder, and the police were very unwilling and could only hope that the jury would not believe Cheng Ming's nonsense. Lao Ji said that it doesn't matter anymore, the important thing is to let the dead mother know the truth. The father just doesn't want to take on the responsibility of taking care of the child, but the final outcome is really the father's "kindness" and filial piety, the son let the father go, but the father killed the killer, Skynet is restored and negligent, I believe that the wicked will always be sanctioned one day, and the poor thing is that the child has done something wrong...

End of this chapter