"The deceased was one hundred and seventy-one centimeters tall, there were no bruises under the skin, no other injuries on his back or abdomen, but there was a wound on his head, which should have been a bruise, and according to the degree of healing of the wound, it was a wound about three days ago. ”

Qiu Lan checked the suspect's body step by step according to the procedure, but when the arm was checked, Zhou Peng suddenly covered his right arm and refused to let go.

"Officer, I've already said it, I really didn't see Shu Qiming that night, why are you still checking around like this, wasting police resources. The suspect frowned, and there was a hint of emptiness in his hurried voice.

"Mr. Zhou, did you see the deceased that night, or did something, we will find out, I hope you cooperate with me now, I will check your arm. ”

The more hidden the place, the more suspicious it becomes, and Qiu Lan knows this.

The frowning suspect saw her tough attitude, and involuntarily lowered his eyes, his eyes dodging in all directions.

"Mr. Zhou, please cooperate, otherwise, we will take coercive measures. Qiu Lan's eyes sank, she spoke indifferently, and her voice was cold and hard, "Also, the charge of intentional homicide is serious, if you really want to prove your innocence, let me check it." ”

After hearing her words, the panicked suspect sighed heavily, frowned and struggled for a moment, and finally stretched his arm in front of her.

"There are three new needle holes in the right arm, which are supposed to have been left from a short time ago, and some old needle holes. Qiu Lan furrowed her brows, carefully examining every inch of skin on Zhou Peng's hands, and the expression on her face became more and more solemn.

With a sallow complexion, a thin body, and various needles on his arms, the results of these examinations were combined, and Qiu Lan finally came to a conclusion.

She took out the needle and took a sample of the suspect's blood, which was then added with two clear, colorless chemicals.

With a slight shock, the blood turned from red to black and purple.

This phenomenon also just confirmed the conclusion that Qiu Lan had made up her mind.

"Officer Xu, this Mr. Zhou should be an addict and has a long-term habit of injecting drugs, and this habit should last for two years. ”

When the words settled, a heavy sigh followed, and the suspect, who looked panicked, frowned, lowered his head, and was depressed.

"Yes, it's been two years, and I've been refusing to say what I was doing that night because of that. He shook his head feebly, his voice trembling slightly.

"That night, I was going to pay back Shu Qiming, but I didn't expect that when I was about to go out, I became addicted to drugs, I, I couldn't help it, I took drugs at home that night, so Shu Qiming's death had nothing to do with me. ”

"Home alone?" Xu Chengyan accentuated his voice, put his hands on the table, stared at the person in front of him with a cold brow, and asked sharply; You're home alone, so you don't have an alibi?"

"Yes. The suspect nodded tremblingly, his brows moving slightly uneasy, "But I really didn't go out of the house that night, and I didn't see Shu Qiming, and even his death was only known when you found me today." ”

"Really, you believe me, really!" Zhou Peng leaned forward excitedly, staring at the person in front of him with firm eyes, eager to clarify his suspicions.

After all, murder is a death sentence, but drug addiction will only send you to a drug rehabilitation center to force drug rehabilitation, which is more serious, as long as you are a person with brains, you will understand.

Qiu Lan and Xu Chengyan, who were standing on the side, looked at each other invariably after hearing his words, and their eyes were meaningful.

"But only you know how to go out, we don't know, what if you are killing someone, or you are addicted to drugs when you kill someone?" Xu Chengyan twisted his brows, stared at the person in front of him with a serious face, and asked rhetorically.

"No, it can't be. I really don't, I don't. The suspect shook his head in a hurry and forcefully denied what he said.

Maybe his head shook too much, involving the wound on the back of his head, Zhou Peng subconsciously touched the location of the wound.

"How did the wound on the back of your head cause it?" Qiu Lan glanced at him sharply and said indifferently.

"Injury?" The suspect was stunned for a few seconds, and his eyes suddenly flashed, "I remembered, this injury, that night, I injected drugs, maybe too excited, so I fell somewhere, when I woke up the next day, it was already like this." ”

Listening to his words, Qiu Lan suddenly thought of something, she lowered her eyes thoughtfully, and thought silently for a moment.

"Officer Xu, I need to take him to the forensic department for a CT scan of his head, and I'm afraid I need to ask Specialist Cao to go to his home to confirm whether he has been injured at home. ”

"Okay!" Xu Chengyan nodded firmly.

Twenty minutes later, in the laboratory of the forensic department, Qiu Lan was holding the suspect's CT film and carefully observing, while Xiao Cong was conducting a tomography examination of the suspect's blood sample.

The wall clock on the wall was ticking, and the two people in the laboratory stared intently at what they were doing, not daring to wander in the slightest.

In the field of science, the most taboo is carelessness, after all, a difference of a few tenths of a millimeter can cause irreparable damage.

After another half an hour, Qiu Lan finally saw what she wanted to see the most.

At the same time, she also happened to receive a call from Cao Fan, an expert in the forensic department, and learned about the situation at the suspect's home.

Everything is confirmed.

She connected to the phone of the serious crime team and told them the final result, "Zhou Peng really didn't go to the scene of the crime, or rather, he had no way to go to the scene at all." ”

This result surprised the members of the Serious Crime Team a little, and it was not until Qiu Lan stated all the reasoning once that their doubts were dispelled.

On the night of the crime, the suspect Zhou Peng did send a message to find the deceased, but before he could go out, he became addicted to drugs.

After injecting drugs, the excessive excitement caused the back of his head to hit the wooden chair handle, which happened to injure the lower part of his brain, causing him to faint directly.

After fainting, the human body secretes an acid group, which will form different forms according to the change of time, and there are specific parameters on scientific forums.

And Qiu Lan just found one of them in the chromatography solution that Xiao Cong separated, and according to the calculation of time, it was an hour before the deceased's death.

In other words, the suspect Zhou Peng had already fainted an hour before the deceased's death, and if he had to wait for him to wake up, it would take at least eight hours, so he had no chance to kill the person at all.

After the case is once again in trouble.

All of them had to go back to the beginning of the whole case and rethink the original question.

If the man wearing the mask mentioned in the mouth of the female injured person is not Zhou Peng, who will it be?

Isn't this case a murder, but a sudden circumstance?

But there is no trace of a third party at the scene of the crime, if it is because of some unexpected situation, how can the murderer clean up so cleanly?