Retracing the Police Path 1993

Liu Pengcheng looked at the box of case files again and thought for a moment: "Make me a copy of the case you mentioned two years ago, and you can keep the rest."

"Our police station does not have a copy machine, only a black and white printer, and many of the documents here are not in the computer. In this way, you can just take this case file with you. This case has not been filed, and these materials are not public materials. , many of which I collected myself." There was some hope in Liu Xin's eyes.

"As long as it's a citizen's report, it's official material," Liu Pengcheng said stubbornly, "Bring me the paperwork and I'll sign it for you."

"it is good!"

After leaving Liu Xin, Liu Pengcheng's mood was not at peace.

The configuration of this small police station is definitely not perfect in all aspects. Judging from the contacts during the day, the people in this station who can be said to be capable of handling cases are Zhao and Liu. And these two people, in the past six years, never gave up investigating the situation in this hospital, and even pretended to be submissive. If Liu Pengcheng hadn't broken the balance with his early investigation into the four institutes, this stalemate might have continued for a while.

On December 12 last year, Zeng Chunyu went to deliver medicine and saw that the police station had a good relationship with the hospital. It should be the police station acting.

Of course, judging from the current situation, it is difficult for this persistence to produce any new results. This cannot be blamed on Liu Xin and Zhao Suo, because a place like the police station only has so few resources.

Looking forward from Zeng Chunyu's line, there is currently no harvest. The quantity of echinacea, licorice and other Chinese medicinal materials Tan Song bought from Zeng Chunyu was not enough at all. It was not like the quantity used by a serious pharmaceutical factory. Even a small workshop should use a larger quantity. Moreover, the products coming out of here seem to have never appeared in the visitor hall on the first floor. They may be filled with Tianxian Liquid and other products and given to the Fourth Hospital.

Liu Pengcheng held the case file in his hand and recalled the previous investigation. When Liu Pengcheng was following Li Xian on Wenwan Street, he found that Li Xian had gone to meet a man named Liu Yong.

Liu Yong was considered a well-known figure near the Antique Street. He once needed a kidney and later had a transplant in a large hospital. The kidney source for this transplant operation was actually provided by terminal cancer patients from the Fourth Hospital. The procedures were legal, the kidney source was healthy, and the hospital was professional. All three combined, Liu Yong survived.

So where does this kidney come from?

Liu Pengcheng looked at the case file in his hand and clenched his fists again and again. This man who disappeared two years ago matched the time of Liu Yong's kidney transplantation. In other words, there is a possibility that Liu Yong used this person's kidney.

Regarding this issue, Liu Pengcheng was not professional. He drove back to the Fourth Hospital in one go, found Dr. Zhao and Xiao Gu, and talked about the matter.

"Does the kidney that Liu Yong removed at that time still exist? If so, we can obtain his DNA without looking for him." Liu Pengcheng had some emotional fluctuations. "Kidney transplantation does not involve removing the kidney." Although Doctor Zhao was angry, he still explained it to Liu Pengcheng seriously. "Kidney transplantation involves adding a kidney to the body, at this location."

As he spoke, Dr. Zhao pointed near his crotch.

"Then how can we determine whether the kidney in Liu Yong's body is related to the missing person's family? We can't tie up Liu Yong, anesthetize him for surgery, and then take a sample from the kidney. Illegal." Liu Pengcheng had a headache. This was just a guess, and it was impossible to do so.

"It doesn't have to be this way," Dr. Zhao explained. "The DNA of the person who provided the organ can indeed be detected in the transplanted organ, but this DNA does not only exist in the original organ. The transplanted kidney will also undergo metabolism and cell death. And dead cells will also enter the blood. The technical term is donor-derived cell-free DNA, commonly known as free DNA. This thing can be detected in blood and urine, but there are DNA enzymes in the human blood circulation that can degrade it. It is a large molecule of DNA, so it is not easy to find complete free DNA. This kind of DNA fragment can also be used for analysis, but the more complete the better, and the one in blood is definitely better than the one in urine."

"I understand, I'll find someone to get him some blood!" Liu Pengcheng came up with many ideas in an instant.

"In his case, he has to go to the hospital for regular check-ups, and some hospitals now have programs to detect cell-free DNA. From the cell-free DNA, the current damage of the transplant can be analyzed in reverse. You can find a way to compare it from here. Okay." Dr. Zhao felt that he was indeed a little tired.

This case was much more troublesome than the case of his house being robbed!

"I understand," Liu Pengcheng took a deep breath and continued, "Xiaogu, you can inform the police here and let Dr. Zhao go back to rest early. The follow-up work will be much simpler. I will report to Director Dai right away. After that, we will go see Li Xian again and learn something about Tan Song from his mouth, at least we will all be detained tonight."

Before Xiao Gu agreed to Liu Pengcheng, Liu Pengcheng's cell phone rang, and it was Director Dai's.

"Director Dai, I just wanted to call you. Who are you?" Liu Pengcheng asked.

"Li Xian attempted suicide and went to the hospital. I have to come and take a look," Director Dai said with a smile. "Li Xian has regained his composure and explained some things. The content is basically consistent with your previous expectations. Come and take a look. .”

"Recruited?" Liu Pengcheng was not surprised at all. After thinking for a few seconds, he left Xiaogu here to arrange the things he had just arranged. He went to the hospital alone. (End of chapter)