Now that the options for additional questions have been determined, the next step is to use the "exclusion method" to find the best answer.
Yue Xingwen glanced at the 20 medical records in the laptop, and said to Ke Shaobin, "The cases are regrouped according to the time of death. How many times has there been a total of concentrated deaths of patients?"
Ke Shaobin quickly put together a form and said: "There are four times in total. From June 1 to 3, 5 people died; from August 10 to 13, 7 people died; from October 15 to 20, 8 people died; we were hospitalized. The time was December 24, and eight more people died within two days."
Yue Xingwen carefully looked at the four groups of cases and continued: "Collect all the patients, doctors and nurses on duty who were left in the cardiovascular ward when the four cases occurred, and find the list with the highest degree of overlap."
Ke Shaobin is sorted by name, and the answer is very clear by comparing the tables.
Yue Xingwen wrote down the five options just determined on a piece of paper, and analyzed: "The first one, 20 patients, he was not present in the past few incidents, this is his first hospitalization, which is completely inconsistent. The conditions for committing the crime can be excluded.”
Yue Xingwen simply crossed out "Option A" and continued to analyze: "The second, 21-bed, 56-year-old Xu Dapeng, once worked as a medical representative. On June 1 and August 10, when the incident occurred He was all present, but he was not hospitalized on October 15. That is to say, the patient was killed four times and he was absent once. He was not the murderer... but a key witness!"
"The third one, the attending doctor Xiao Wen, happens to be the chief inpatient this year. He is in the cardiovascular ward almost every day. At present, the possibility of random killings cannot be ruled out. To be determined first."
"The fourth suspect, 30-year-old resident doctor Ma Ping, has an irregular night shift time. He was not at the scene when the crime happened on June 1 and August 10, and he did not meet the conditions for committing the crime."
The trio set their sights on the last option.
E option, after the database data analysis, find out the latent patients.
Yue Xingwen looked at the name and narrowed his eyes slightly: "The last suspect, Zhu Yuanbo, a 55-year-old male, a retired employee of a pharmaceutical factory. On June 1, August 10, October 15, and December 24, every When the second patient died in a concentrated manner, he lived in the cardiovascular ward. When the first incident occurred, he lived in bed 11, which was the closest to the 10-bed old lady who died. He was very likely to be the murderer. "
Yue Xingwen looked at the remaining options on the paper, circled the two names with a pen, and said, "Xiao Wen, Zhu Yuanbo, the murderer is among these two people."
After comparing and sorting out the data, the originally complicated situation finally became clear, and the answer became a choice.
At noon, Yue Xingwen pretended to stroll around the wards and handed the written notes to the classmates.
On the white paper torn from the dictionary, he wrote a few lines with a black pen, and the handwriting was chic and flying: "Dear students, all the previous 20 victims have been found, and the incidents occurred on June 1 and August 10. No., October 15th, and December 24th, according to the comparison of the data in the case database, at present, the 20th, 21st, and Dr. Ma Ping were not at the scene several times when the case occurred, and the suspicion has been ruled out. Lock Dr. Xiao Wen and Dr. Add a new suspect, VIP-1 bed Zhu Yuanbo, and choose one of the two murderers, and start investigating the motive for the crime."
The students who got the note all sighed with emotion—it felt like they encountered additional questions that they could not do at all during the exam. As a result, Xueba personally wrote a cheat sheet for everyone.
In the afternoon, Yue Xingwen assigned investigation tasks to the students. Several girls tried to talk to other patients in the ward and asked about Dr. Xiao Wen's situation.
Liu Xiaoxiao is 155cm tall, petite and cute, with a particularly sweet mouth. She found an old grandmother who had been hospitalized three times from the list given by Yue Xingwen, and pretended to chat about Dr. Xiao's situation.
At the same time, Yue Xingwen was also investigating the key witness, Xu Dapeng of 21 beds.
At first, he suspected that this person was the murderer, but in the end he found out that this person was actually a key witness who was present three times in four incidents. Uncle Xu looked energetic, Yue Xingwen and Liu Zhaoqing went to his ward and pretended to chat.
Yue Xingwen said politely: "Uncle, you have already had heart surgery, right? The doctor asked us to do the surgery. We were a little scared and wanted to ask about the seniors who had surgery."
Xu Dapeng smiled heartily: "What is there to be afraid of in surgery? Interventional surgery is not an operation on the chest, but a small incision in the blood vessel of the thigh, and the stent is introduced into the heart along the blood vessel."
Liu Zhaoqing immediately asked, "When did you have the surgery?"
Xu Dapeng said: "June 3rd."
Yue Xingwen pretended to be curious: "Did anyone die in the ward when you were hospitalized? Several patients died in a row in the past two days. When I went out today, I saw a nurse pushing a hospital bed covered with a white cloth..."
Xu Dapeng sighed and said, "Sudden death from a heart attack is quite common. The last few times I was hospitalized, I encountered people who died in the ward. Today, the 19th bed next to me is also gone. The one you saw in the morning is probably him."
Yue Xingwen asked, "Did you hear any noise in the corridor this early morning?"
Xu Dapeng recalled carefully for a moment, and then said, "I slept very hard, but... I vaguely felt that a doctor seemed to come to change the dressing of the next hospital bed. Later, the ECG monitor on the next bed suddenly called the police, and the doctors and nurses broke into the ward for rescue. , I just found out that it was the 19th bed that had an accident."
"Dr. Xiao is in charge of the rescue?"
"Well, every time, Dr. Xiao and the nurse on duty worked together to rescue him. They rescued him for half an hour last night, but couldn't get it back. Alas... 19 beds is a pity. He is only 55 years old, and he is about the same age as me."
The two looked at each other and chatted with Mr. Xu again, before leaving the ward.
Mr. Xu's memory of the previous hospitalizations was not very clear, but this time, the murderer happened to kill him next door. In the early morning, he noticed that someone came to change the medicine in the next bed, which proved that the murderer's modus operandi was indeed injecting drugs into the patient. However, the murderer was extra careful, and perhaps even pretended to be a medical staff to enter and leave the ward, which did not arouse the suspicion of the patients.
Liu Xiaoxiao was waiting for them in the corridor. After seeing Yue Xingwen, she immediately stepped forward and whispered, "Xingwen, we split up and asked some grandmothers in the ward. Everyone spoke highly of Dr. Xiao. Another grandmother was rescued by Dr. Xiao. In addition, they also gossip that Dr. Xiao was busy with work and hadn’t found a girlfriend. There were grandmothers in the ward who enthusiastically introduced people to him, but he rejected them because he was too busy with work. "
Too busy at work to find a girlfriend
Yue Xingwen touched his chin and fell into contemplation.
In the past six months, Dr. Xiao has been in the ward every day, and he has sufficient time and conditions to commit crimes.
Suppose he is an antisocial personality disorder, or a psychopath. After many years of studying medicine, he starts to kill his own patients with the knowledge he has learned, and kills a few patients when he is in a bad mood to find stimulation and a sense of accomplishment...
Then why did he focus on killing people
He has been in the ward for a long time, and can kill at any time, 365 days a year, there is no need to concentrate on killing several in a few days.
For several days in a row, a large number of patients died. The doctors had to rescue them, discuss the cases, make summaries, and report the results of the discussion of the death cases to the superiors. He himself would be very busy.
While injecting drugs to the patient to cause myocardial infarction, he ran over to rescue the patient, rescued several in one night, but could not survive, and then wrote the death case report... Is he too busy to find trouble for himself
For him, killing one every few days, so that people can't detect it, is a more reasonable way to commit crimes, right
What's more, there is also an old lady in the ward who said that she was rescued by Xiao Wen from a heart attack. If Dr. Xiao was really the murderer, why did he kill people while saving people? This is really inconsistent and inexplicable.
Relatively speaking, Zhu Yuanbo is more suspicious.
Yue Xingwen was silent for a moment, and whispered to Liu Zhaoqing: "Senior brother, it seems that you have to check this Zhu Yuanbo yourself."
Liu Zhaoqing asked solemnly, "Do you want to sneak into his ward?"
Yue Xingwen nodded, turned to look at Liu Xiaoxiao: "please call Qin Lu, I need her help."
Liu Xiaoxiao quickly called Qin Lu from the Department of Geography, and Yue Xingwen let the three of them listen to him and whispered, "Uncle Zhu Yuan just finished his dinner. Before going to bed, he should go out and throw away the garbage in the lunch box. While he is out, do you think? The way to entangle him, Qin Lu and I will go into the ward to find clues. Brother, once he returns, call the police immediately. "
All three understood.
At around seven in the evening, all the patients in the ward were having their dinner.
Yue Xingwen and Liu Zhaoqing pretended to take a walk near the nurse's station, while Qin Lu and Liu Xiaoxiao sat in the chairs next to them, and found a cardiovascular disease brochure from the ward, and looked down at them seriously.
After waiting for a long time, the door of the VIP ward suddenly opened.
The four immediately tense their nerves.
An old man walked out, holding the lunch box in his left hand, turned around to throw away the garbage in the place where the lunch boxes were thrown away, Yue Xingwen made a gesture behind him, and when the old man walked away, he and Qin Lufei quickly entered the room.
Ward VIP-1 is located in the lower left corner. There is a glass window on the door. Usually, the curtain can be drawn to maintain privacy, but as long as the curtain is opened, the situation of the nurse station can be clearly observed. .
The ward is very spacious, with a soft sofa and an LCD TV on the wall.
Yue Xingwen noticed that there was no folding bed for family members to stay overnight in the ward, nor did he have any fruit baskets, flowers, etc. Obviously, no one had visited him during the hospitalization. The entire ward was spotlessly clean, and even the quilt on the bed was neat. It seems that this old man Zhu has a certain degree of obsessive-compulsive disorder.
Yue Xingwen turned his attention to the patient's closet for storing daily necessities. He opened the closet and quickly rummaged through it. There was a black suit hanging in the closet, which Mr. Zhu wore before he was hospitalized. Yue Xingwen flipped through the pocket of his suit and pulled out a wallet.
There is a picture in the wallet.
The photo is a family portrait of four people, two sitting in front and two standing behind.
At a glance, Yue Xingwen recognized that the old man with white temples sitting in front was Zhu Yuanbo, and the old lady he was gently hugging looked very temperamental and should be his wife. Standing behind the two was a girl with a ponytail, she was pretty and had two lovely dimples on her face when she smiled. Another young man—
It was actually Dr. Xiao Wen.
Yue Xingwen's scalp went numb for a while, he quickly put the photo in his pocket, hung up his suit, and continued to rummage under the closet. Then, Yue Xingwen found a brand new white coat that was stacked on the bottom layer.
Qin Lu was stunned and whispered, "It seems that he is wearing a white coat, pretending to be a doctor to enter and leave the ward?"
Yue Xingwen's face was serious: "Go to the bathroom and have a look."
Qin Lu pushed open the door of the bathroom, which was also clean and tidy. Yue Xingwen carefully searched for clues around the toilet. Suddenly, Qin Lu said, "Xingwen, look here!" He followed the girl's gaze and took a closer look. , found a needle in the corner next to the trash can.
Qin Lu tore off a tissue and carefully picked up the needle and showed it to Yue Xingwen.
That's the needle of a disposable syringe.
The needles of the patients were all brought back to the medical waste recycling station by the nurses. The injection needles that appeared in the toilet of the ward were obviously what Mr. Zhu brought into the hospital in private. When he was sorting out the crime tools in the bathroom, a brand new needle accidentally fell into the corner of the trash can and was found by Qin Lu and Yue Xingwen.
At this moment, a conversation suddenly sounded outside: "Hello, old man, I want to ask, have you ever had any interventional surgery before? Oh, old man, don't ignore me, I am a patient in the next bed... old man !"
Liu Zhaoqing's voice is very loud, mixed with footsteps, Zhu Lao is back!
Yue Xingwen immediately closed the bathroom door with his backhand.
Just hearing a "squeak", the door of the ward was gently pushed open, and Zhu Yuanbo's footsteps were getting closer and closer, as he was walking towards the bathroom, Qin Lu quickly took out the globe: "Transform!"
The toilet board where the two of them were and the board Qin Lu had previously ordered changed positions in an instant. They suddenly appeared in the rest area in the upper left corner of the ward, and Liu Xiaoxiao was there to respond.
Seeing that the two of them came out of the ward safe and sound, Liu Xiaoxiao breathed a sigh of relief and stepped forward: "Are you all right?"
"It's okay." Yue Xingwen handed the photo to Liu Xiaoxiao: "This girl should be Xiao Wen's girlfriend."
Liu Xiaoxiao took the photo and said, "It's not just girlfriends. They have matching rings on their hands, so they should already be engaged!"
Yue Xingwen followed the position where Liu Xiaoxiao pointed, and sure enough, in the gap between the two old men's standing, two young men behind them could be seen intertwining their fingers intimately. Pair of wedding rings.
Liu Xiaoxiao suddenly realized: "No wonder Dr. Xiao has never been looking for a girlfriend. He should like this fiancée very much and can't forget her, so when others introduce him to girlfriends, they are all rejected by him using the excuse of being too busy with work!"
All the clues finally came together.
Yue Xingwen took the two girls to the ward in the upper right corner and handed the photo to Ke Shaobin: "Further the information, and check whether a girl surnamed Zhu died of a heart attack in the last few years."
Ke Shaobin was shocked when he saw the photo, and hurriedly turned on the computer to search for keywords. It didn't take a moment for him to find that a 25-year-old girl named "Zhu Chenxue" died of a heart attack a year ago at 1 am. In Zhu Chenxue's "family" column, his father's name is Zhu Yuanbo, and his mother's name is Xue Huaning. Continuing to search for Xue Huaning, I found that the 50-year-old died of a heart attack a year ago, and the time of death was also in the early morning.
The four looked at each other.
Yue Xingwen glanced at the photo again and sighed, "I found the murderer's motive."
In the photo, Zhu Yuanbo has a gentle and loving smile. His daughter finally got engaged to a young and promising doctor. However, the good times did not last long. His favorite wife and only daughter died of heart disease one after another. Zhu Yuanbo's psychology gradually became distorted, and he began to kill the ward Cardiac patients who can receive treatment.
Xiao Wen is his daughter's fiancé. With this relationship, he can easily live in the cardiovascular ward.
Xiao Wen is probably guilty of his girlfriend's death, so he never refuses the "father-in-law" to be hospitalized. Whenever Mr. Zhu wants to be hospitalized, Xiao Wen can make a bed for him and take care of him personally. This time Also directly admitted to the VIP ward. Dr. Xiao probably did not expect that this old man would become a bloodthirsty butcher because of the death of his wife and daughter.
All four were present at the time of the incident.
The closest to the first dead person.
Both his wife and daughter died of heart disease, causing psychological distortions.
I'm a heart patient myself, working in pharmacy and know how to kill a heart attack patient fast.
The missing needles were found in the bathroom of the ward, and a brand-new white coat was found in the closet.
The photo reminded him of his special relationship with Xiao Wen, the chief doctor in the ward.
Ironclad evidence.
The murderer lurking in the cardiovascular ward is this mysterious patient—Zhu Yuanbo of the VIP ward!