Linzhou Municipal Bureau

Forensic doctor Ding hurried into the hall of the Criminal Investigation Brigade, took off his hat and fanned the beads of sweat on his head.Quan Yifeng, who had just put down the phone, and all the team members gathered around.

"Director Pang has already contacted you, right?" Ding Jian looked at the posture of everyone and knew the meaning of the astonishment on everyone's face. "Let me tell you what I know."

"It was less than 05:30 this morning. I was woken up by a soul-hunting call in my sleep. I saw that it was Captain Huang from the Xiu'an Detachment. He opened his mouth and said that they encountered a problem. A bizarre case that needs my support.

It is said that yesterday at around [-]:[-] p.m., a car accident occurred on the autumn tour bus of the second grade of the city's second experimental primary school. Two students and a teacher were killed on the spot, and three were seriously injured.The three seriously injured were all sent to Linzhou Central Hospital, and one of the seriously injured students was Zhao Han.

This Zhao Han was seriously injured. When he was sent to the emergency room of the hospital, he was in hemorrhagic shock, so the hospital gave him a blood transfusion immediately.But unfortunately, he still failed to survive and died around 03:30 this morning.

At that time, only his grandparents were by his side. Unfortunately, both his parents were on business trips overseas, and they said that they would not be able to return until noon today at the earliest.The old man is only such a grandson, so naturally he can't stand such a blow.But it was obvious that the two elders were not idle people. Not long after they grieved, at about [-]:[-], they fought with the attending doctor and nurse. For some reason, a few young and strong relatives also came after a while.The attending doctor identified minor injuries, but the head was bleeding, it looked really miserable. "

Fang Fang refilled Ding Jian's thermos cup with warm tea, and handed it to him while he was taking a break, saying, "It's another medical incident? What's so weird about it?"

Ding Jian took a sip of tea and continued: "There is nothing unusual about medical troubles, but this time it's a little different. People from the Xiu'an detachment received a report from the hospital and sent a team to rush there. The old couple met After seeing the police, without saying a word, he threw himself in front of the Huang team and the others, crying and saying that the doctor had disregarded human life and killed their grandson, and the evidence is solid."

"What evidence?" Quan Yifeng asked.

"It's the blood bag for Zhao Han's blood transfusion yesterday afternoon." Ding Jian tightened the lid of the thermos cup and raised his eyebrows.

"Blood bag?" Wang Fu asked everyone's questions, "What's wrong with the blood bag? Such a professional medical item, ordinary people can't see it? Is the blood expired to the point where it can be seen through at a glance? The management of the central hospital may not Are you so relaxed?"

"It's even more obvious than that," Ding Jian said, "It's the wrong blood type."

Everyone let out an exclamation of "ah".

Ding Jian went on to say: "This is an almost impossible mistake. Even though the scene caused by the car accident was critical and chaotic, as a regular large hospital, the quality of medical staff is still guaranteed. No matter how busy you are, it is impossible to miss it." Preparations before blood transfusion. So the hospital immediately sent someone to collect Zhao Han’s anticoagulated blood samples before blood transfusion. After careful checking, it was confirmed that Zhao Han’s blood and the blood delivered from the blood bank were both type O, blood type And no problem.

Just when everyone breathed a sigh of relief, the two elders insisted that their grandson's blood type was A, and they also produced a physical examination report issued by a chain medical examination center two years ago, which clearly marked the child's blood type . "

"Could it be that the medical examination center made a mistake? Sometimes these places are not so reliable." Li Yunbin asked.

"Huang Detachment and the others thought so at the beginning," Ding Jian said. "However, the two elders found a blood donation certificate of Zhao Han's father Zhao Tianbing from the mobile phone, which said type AB. In this way, things are more complicated." It’s difficult. Because parents with type AB can’t give birth to a child with type O anyway. But the blood type test at the central hospital can’t be wrong, so what’s going on?”

"Hehe, it's hard to say." Fang Fang's gossip radar biubiu buzzed, and he had a smirk on his face.

Ding Jian cast a complicated look at her with the parents' pampering and contempt for the juniors, and said: "At that time, the two sides insisted on their own opinions, and the scene almost got out of control for a while. The Huang Detachment, who were in a dilemma, had no choice but to make a bad move and let the DNA The family room carried out the relative identification of the deceased and his grandfather overnight. In less than two hours, the urgent result came out, and Zhao Han was indeed his grandson. Moreover, Zhao Tianbing's blood donation certificate was issued by Linzhou Central Hospital three years ago , if there is really a breach of duty, the Central Hospital can't get rid of it anyway. That's why they found me before dawn."

Quan Yifeng stroked his chin and said, "The DNA of the deceased was collected at that time? But even if Zhao Han and Liu Chenhao are brothers, it is impossible for the DNA of the two to be exactly the same? Old Ding, don't be fooled."

"Haha, Yifeng saw the key at a glance." Ding Jian smiled and nodded with satisfaction, "The DNA of Zhao Han collected at the time did not match Liu Chenhao's, but another set of DNA from him matched."

"Another set of DNA?" Everyone couldn't help being surprised.

"Actually, I have never encountered this kind of situation in my [-] years of work, but it exists in theory, so after I went to the scene to understand the situation, after some thinking, I decided to let them try it out. The hematopoietic stem cells of the deceased, which is commonly referred to as bone marrow, undergo another DNA test."

Ding Jian looked around at the bewildered expressions of the crowd, and then said: "You may have heard of bone marrow transplantation, but you may not understand the details. Generally speaking, a person's blood type depends on his own DNA. But for those who have received bone marrow transplantation For people undergoing transplantation, the operation needs to eliminate their own hematopoietic stem cells, and then implant allogeneic hematopoietic stem cells into the recipient to completely replace the original hematopoietic stem cells. And human blood is produced from hematopoietic stem cells , so in fact the DNA of the recipient's blood system will change accordingly, and the blood type will also change accordingly.

Sure enough, through the second test, we found another set of DNA in the blood system of the deceased.That is, this set of DNA unexpectedly matched Curry Liu Chenhao's. "

Everyone cast admiring glances at Ding Jian one after another, and they all admired the magical creature like the forensic doctor.

Ding Jian raised his head, his expression said: You guys are young, you still don't see much of the world.

He went on to say: "However, what is even more incredible is that after questioning, the child's grandparents all said that he had never received any bone marrow transplantation before his death."

Li Yunbin said: "This is too unreasonable. If the grandparents love their grandson so much, if their grandson has undergone a bone marrow transplant, how can they know nothing about such an important operation?"

It seems that there are indeed many doubts in this case.Just listening to Ding's forensic doctor's description, one can feel that the mysteries are intertwined with each other, and there is also the intersection of Liu Chenhao, so the criminal police brigade immediately merged the case.

First of all, the first obvious question is, when did Liu Chenhao donate hematopoietic stem cells?According to Ding's forensic report, judging from the surgical wound on Zhao Han's body, the transplant operation probably took place in March or April this year.According to the previous investigation in Fengwei Village, the last time Liu Chenhao appeared in the village was probably at the beginning of this year.Then, did this operation happen before or after Liu Chenhao disappeared?

Liu Fuqiang and his wife, who were still squatting in the detention center, were still ignorant of the police officers' questioning. It seemed that the family's indifference towards their mentally retarded son was consistent.

Then the second question is, why did Zhao Han's grandparents not know about the transplant operation?Was Zhao Han's parents hiding this from them?Why hide it?Fortunately, Zhao Han's parents' flight back to China will arrive soon, and they will not only have the answer to Zhao Han's mystery, but also the answer to Liu Chenhao's mystery.

Quan Yifeng glanced at the arrival information screen hanging in the arrival hall of the airport, and it showed that the time was 12:52.Because Zhao Tianbing and his wife did not have the exact flight number, they could only calculate the possible flight from the arrival time learned by Zhao Han's grandparents.However, the flight from the city where Zhao Tianbing and his wife lived to Linzhou, even the latest flight during the day, had already arrived five or ten minutes ago.Counting the delay in customs clearance and waiting for luggage, it should be out.What's more, the couple's mobile phones have not been connected.Yep, it's not turned off, it just won't turn on.

Quan Yifeng looked at the screen of his mobile phone, feeling something was wrong in his heart, he dialed Li Yunbin's phone number and said, "Let's locate directly."

Linzhou Central Hospital, as one of the three top hospitals recognized by the citizens of Linzhou, is always busy in front of the door except for the quiet moment at two or three o'clock in the morning.Not only Linzhou, people from many nearby cities flock to this hospital if they suffer from any intractable disease.The hustle and bustle of people, the rushing traffic, and the rapid beeping of ambulances from time to time not only demonstrate the medical level and strength here, but also insinuate the shortage and excess of high-quality medical resources. concentrated.

Quan Yifeng looked at the positioning map sent by Li Yunbin.Zhao Han's parents, Zhao Tianbing and Wei Juan, went straight to Linzhou Central Hospital after leaving the airport.But the strange thing is that from this precise map, no matter whether it is the emergency building, the ICU or the building where the mortuary is located, there is no footprint of the two.They didn't enter the hospital, but just stayed at the hospital gate and the surrounding area for about 10 to [-] minutes, and then they walked to the end of a small road at the side door, and lost their positioning signal.

Li Yunbin and the others immediately called up the nearby surveillance cameras. Both face recognition and "eye recognition" were used, but there was still no sign of the two of them, as if they had disappeared out of thin air.