The biggest difficulty in prosecuting Zhang Chanjuan is to prove that she was there when You Gang was killed.

The one kilometer radius of the villa was deserted, and the only neighbor was out of the country for a long time. The police could not find any witnesses, so they could only pin all their hopes on forensics and forensics.

Locard's principle of material exchange, when a murder occurs, as long as the murderer has contact with the victim, he will inevitably take some things away and leave some things behind.The forensic personnel found what Zhang Chanjuan took away—You Gang's blood, but they couldn't prove when she took it away.

In the end, all the pressure fell on the forensic doctor.

Rong Zhen repeatedly checked the autopsy report in his hand, forgot to eat and sleep for two or three days, and even forgot to apply the mask, and finally found a breakthrough—You Gang had injected anti-aging injections before his death, in order to resist the side effects caused by rejection, Corresponding anti-rejection drugs must be taken.

Many anti-rejection drugs have a metabolic cycle, and as time goes by, the drug concentration in the blood will decrease regularly.

That is to say, as long as the blood in You Gang's corpse is tested, if the concentration of anti-rejection drugs in it is the same as the blood extracted from Zhang Chanjuan's bag, it can be proved that she was contaminated with the blood of the deceased on the day of the crime.

Then she must be at the crime scene.

"So that's how it is!" Xiao Su suddenly realized, and couldn't help but cast all his eyes on Rong Zhen's imagination, "The puffer fish is so powerful, it can even imagine such tiny details, it is worthy of being the top forensic doctor of the Criminal Investigation Bureau!"

"..." Rong Rui curled his lips, and for the first time did not refute his admiration for Rongzhen, and said, "Well, his move was really aggressive. At that time, even the old grandson praised him for his professionalism."

Xiao Su nodded repeatedly.Rong Rui continued: "Actually, he was only holding on to a glimmer of hope at the time. After all, he didn't know what kind of anti-rejection drug You Gang was taking, how long the medication cycle was, and whether it was good for testing... So he made a special trip to find it. Wu Xinyu, let her do a comprehensive qualitative analysis of the anti-rejection drugs in You Gang's blood."

The pig essence Page was still very powerful at the critical moment. Of course, it was Rongzheng's luck that they found an anti-rejection drug that was very suitable for quantitative analysis in You Gang.

The drug only needs to be given as an intravenous infusion at the first occurrence of rejection, has a long metabolic cycle, and is easy to detect.

So Rong Zheng took the report of the Chinese Academy of Sciences, and the criminal police of the task force found You Gang's mistress.Xiaosan lost her strong backer and was crying and gnashing her teeth. Hearing that the murderer who killed the benefactor could be found, she handed over You Gang's medical records without saying a word.

The medical records proved that You Gang had only received anti-aging injections once, so he had only received this anti-rejection drug infusion once.Rong Zheng recorded the injection date and injection dose, and estimated that an appraisal report would be issued within a day or two, proving that by comparing the drug metabolism in the blood of the two groups, the evidence of Zhang Chanjuan's murder could be locked.

After listening to Rong Rui's explanation, Xiao Su sighed: "Rong Zhen is such a strange person. When I saw him for the first time, I couldn't believe that he was a forensic doctor. How could there be a forensic doctor disguised as an elf king in the world?"

"There are female scientists disguised as gothic lolitas, and there are forensic doctors disguised as elf kings." Rong Rui said, "So I also figured it out. They'd better digest it internally and stop going out to scare people."

Xiao Su couldn't help laughing: "Where is it scary? You are so eye-catching, why are you so old-fashioned, a brat!"

Rong Rui turned dark and said, "I shouldn't have told you, I'm younger than you!"

Xiao Su laughed and said: "Don't you tell me that I can't see that you are a kid? You forgot what I studied? What kind of creature should look like at what stage of development? Do I still need to check your ID card?"

Rong Rui was at a loss for words, and suddenly threw the half-eaten apple onto the plate and said, "I'm leaving."

Huh?Really angry?Xiao Su didn't expect him to turn his face suddenly, and hurriedly said: "Let's go after eating the fruit, how can I eat so much by myself, it's all wasted."

Rongrui put on his clothes, changed his shoes and left without saying a word, his passive skills were as stable as if they had been buffed.Xiao Su had never seen him so disrespectful to himself, and even the back of his head seemed to be written with the words "You Jin" in big characters. He felt a little panicked for no reason, and hurried out to grab his arm: "Wait, I'll send you off." You, it's so late, and it's raining again..."

Rong Rui struggled lightly, but didn't break free, and finally turned back and said coldly: "You have such good eyesight, can't you see that a creature like me is not afraid of being late or cold at this stage of development, and has no fear at all?"

Xiao Su was stunned for two seconds before punctuating his sentence, and he complained a lot in his heart - he lost his temper and boasted at the same time, what kind of coquettish manipulation are you doing?

So should I laugh?

While hesitating, the elevator came, and Rong Rui broke away from him and walked in.Xiao Su stepped on his heels and pressed the basement floor: "Stop making trouble, can't I make a mistake? May I apologize to you?"

Rong Rui turned his face away and said nothing, as if refusing to accept the apology.

Xiao Su has never been so humble since he was so old, and he was a little unhappy, so he folded his arms and ignored him.

The elevator hummed and descended, and the atmosphere became more and more gloomy. The door opened halfway, but the neighbors outside didn't dare to come up, looked at them suspiciously for a while, and closed the door for them: "Go first, go first. "

"Ding——" With a soft sound, the elevator finally went down to the basement. Xiao Su wanted to go out, but Rong Rui grabbed him and said, "Go back."

He was extremely strong, Xiao Su struggled a bit, only felt a sharp pain in his forearm, suddenly became angry, and said angrily: "What are you doing?"

Rong Rui withdrew his hand abruptly, met his angry eyes, flinched obviously, and said in a low voice: "You, you wear too little, and I don't wear much, so I can't take it off for you...I'll go back and wear it with you." coat?"

Xiao Su became dumb all of a sudden, his eyes widened and he couldn't speak.Rong Rui lowered his eyes and said, "You haven't changed your shoes, it's too dangerous to drive in slippers."

You must be the magic star of my previous life!Xiao Su asked himself that his temper was good enough, and he didn't know why he was so angry that he wanted to hit someone, so he stretched out his hand to block the sensor, and said, "Go back yourself, I suddenly have a headache and don't want to send it away."

Rong Rui stood still, and the elevator door closed automatically for a long time before he said, "Then I'll take you up, I don't have a headache."

The elevator buzzed and went up again, Xiao Su was almost desperate, and he didn't know what he was singing.The door opened again halfway, and the neighbor closed the door for them again helplessly: "You guys go first, go first."

After tossing back and forth, Xiao Su finally changed his coat and went to send the magic star he hit.

Rong Rui looked like a doormat, sitting in the passenger seat without saying a word and picking his fingers.After all, Xiao Su was old enough to appreciate, so he lowered his figure and passed the steps to him: "Did you come here without winter clothes? The temperature is going to cool down again soon, why don't you always wear short sleeves?"

Rong Rui raised his head, the aura of cowardice disappeared in an instant, and said: "There is no one at home, no one packs for me, and I don't bother to go back... Can you take me shopping someday?"

The last sentence could almost hear the sound of wagging the tail, Xiao Su unconsciously lost his anger, and the corners of his mouth could not help but curl up: "There is no class on Friday afternoon."

"Then I'll wait for you at school at noon." Rong Rui said immediately, "I'll treat you to lunch, and you help me choose clothes."

"Row."

It's like shaking hands and making peace.Xiao Su turned on the stereo, and the FM music station was playing Bach's cello music, which sounded very peaceful and pleasant amidst the rustling rain.

The atmosphere calmed down completely, and it became the same as usual again. Xiao Su asked him, "Why is there no one at home? Where's your dad?"

"I'm on a business trip." Rong Rui said, "He's busier than me. He goes on a business trip once a year, for a year at a time."

"Oh?" Xiao Su was stunned, "What is he so busy with? Surveying and mapping? Geology?"

"Anyway, it's all field work, living in a tent all day long." Rong Rui mentioned that his father seemed not very interested, but just now Xiao Su got angry, and he didn't dare to perfunctory him, saying, "It's useless even at home, he I don’t even know where the soy sauce bottle is at home.”

Xiao Su smiled and said, "You still have soy sauce bottles? Don't you only have instant noodles and hot pot bottoms?"

Rong Rui was at a loss for words, and said sullenly: "Anyway, he is just a decoration at home."

It seems that the relationship between their father and son is not very good. Xiao Su actually understands it quite well. A family that loses its mistress is like losing its soul. Two male animals live under the same roof. Even father and son find it difficult to get along well.

Especially with Rongrui's stubborn temper, his father was lucky that he didn't get mad at him.

All the way to the hotel, before Rong Rui got off the car, he suddenly remembered something and said, "By the way, your car can be retrieved. They asked me to tell you about that minicooper, and see if you are free to pick it up someday." .”

Speaking of this small car, Xiao Su still felt very heartbroken. After all, it was his first car, but he was dragged to death: "Forget it, let them deal with it casually."

"They can't handle it, you have to handle it yourself." Rong Rui said, "If you're jealous, I'll drive you to a car dealership and sell it."

Xiao Su is not taboo, let alone his own taboo, don’t he need to be taboo? After thinking about it, he said: “I’ll pick it up after class on Friday, and send it to the car dealer for consignment. It should be soon, it’s done. Let me go shopping with you again?"

"Okay." Rong Rui waved two fingers together in front of his forehead as usual, "Be careful on the road, brother."

Today's "brother" seems to be called very softly, which is completely apologetic and flattering.Xiao Su waved his hand, his heart was no longer angry at all, he just felt that he was sensible and well-behaved, and he was loving.

With this psychological change, Xiao Su himself felt that he had no principles.

In a blink of an eye, it was Friday, and Rong Rui rushed to the school to pick up Xiao Su at twelve o'clock, and accompanied him to the city bureau to pick up the car after lunch.

Little Cooper is actually quite cute, I think Fang Huize helped Xiao Su choose him back then.Grandma passed away suddenly that year, and Aze rushed back from the United States to attend the funeral, and then accompanied him to a 4S store to buy this scooter.

At that time, Xiao Su still hoped that Aze would stay and take care of Fang's business with his mother.Aze was almost moved by him, but unfortunately, his partner in the United States talked about a big deal, and he left the house again without hesitation after a while.

Mother said that Aze belonged to the wind, and no one could keep him, so he could only let him go.

Xiao Su sometimes felt envious, and sometimes felt bewildered, after all, he was the little uncle who grew up with him, smart and domineering, a hundred times stronger than Wu Xingyu.

"Let's go." Xiao Su gave himself a minute of mental training, planning to get into the driving seat.In the end, Rongrui stopped him: "Let me drive. I made an appointment for the car dealership. I know the way... You can just drive a new car and follow me."

Xiao Su appreciated his thoughtfulness, and followed him to the car dealership as promised.

When the consultant came out to pick up the car and go through the procedures, Xiao Su took out the document bag from the glove box and showed him various documents, manuals and insurance policies.Rong Rui suddenly said: "What is this?"

The document pocket is translucent, stick-on, with a thin black decorative line around it.Xiao Su looked carefully for a long time, only to find a piece of hair sticking to the opening, which coincides with the decorative line, and ordinary people can't see it at all.

But it was obvious that Rongrui was not an ordinary person. He took the file bag over and took a closer look under the light: "It's so long, it should be a woman's hair, and it has been dyed... Is your mother and sister's hair this color?"

Xiao Su shook his head: "My mother has short hair, and it was permed. Xiao Ran dyed it dark maroon, not this kind of brown-red." Before Rong Rui could ask, he confessed, "I have never carried a female colleague in this car. In the past two years, only you and Wu Xingyu have sat together."

Rongrui asked the second-hand consultant again: "Did anyone with long hair get in the car during the car inspection?"

"No," said the advisor. "Our workers are all short cuts, men."

Rong Rui didn't say anything more, took an evidence bag and put his hair in it, and left the car dealership with Xiao Su.

The two drove Xiao Su's new car to the city. Xiao Su asked him: "Is there something strange about this hair? Could it be that Zhang Chanjuan accidentally left it behind when she was carrying You Gang's body?"

Rong Rui said: "Zhang Chanjuan's hair was indeed dyed, but it was wine red, not reddish brown, and it was curled."

Xiao Su recalled, the time he and Wu Xingyu met Zhang Chanjuan in September, she did have curly hair...but wine red and red are so similar, he was a little uncertain.

"Could it belong to You Li?" Xiao Su asked again, "Do you still remember the testimony of Zhang Chanjuan's nanny? The night You Gang was dumped, Zhang Chanjuan acted all night. Cover. Could it be that Yuli left behind accidentally when she rushed back to the villa in the middle of the night to dispose of the corpse?"

Rong Rui was silent for a while, and said: "This hair is very similar to You Li's, no matter the length or color, but...brother, have you ever thought about how you can smooth You Gang's hair with the strength of You Li alone? Get it on your car, and then rush to Shishuiling in the heavy rain, and throw it into the mud puddle?"

You Li is about 1.6 meters [-] tall, with a slim figure and a weak willow supporting the wind.Yougang is tall and burly, at least three laps stronger than her.

After death, people become very heavy and difficult to move. Even with the help of a cart or a wheelchair, it is not an easy task to move a 60-year-old man from the house to the car.

"Could they still be accomplices?" Xiao Su blurted out, "Is this hair left by the accomplices?"

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