Serious Crime Unit 1

Chapter 1025 Fatal Adrenaline (5)
"Is the rooftop open?"

"No, maybe the hospital is worried that some patients will go to the rooftop and jump off the building to commit suicide, so the rooftop is closed. There is a wooden door leading to the rooftop, which is locked with a hidden lock, but it is a simple spring lock, just use a card Open it." Xiao Ke replied.

"Have any shoe prints been found on the rooftop?"

"There are no fresh shoe prints. The suspect will not take off the shoe covers and throw them away as soon as he goes to the rooftop. This is a thoughtful suspect and will never make such a mistake."

"There should be monitors on the stairs or elevators leading to the rooftop, right?"

"There are monitors installed in the elevator, but not on the stairs, but there is a monitor installed at the stairwell on the first floor. We took a cursory look and found that the flow of people at the stairwell on the first floor was too large to identify the suspect. "

"Elevators and stairs are the only way to the rooftop, right?" Jiang Yiming asked.

"Yes, there is no other way."

At this time, Luo Jin walked into the office, handed a laboratory test sheet to Wu Jiang and said, "Brother Angkor, this is the report sheet of the things you gave me for testing."

"Jutein, cyanidin monosaccharide, fructose, glucose... I can't understand so many names. Just tell me what they are."

"It is jute, which is the material used to make hemp rope. Do you understand now?" Luo Jin asked with a smile.

"Before I gave it to you for testing, I knew it was fibers that fell from the hemp rope."

"Then why do you need to leave it to me for testing? Isn't this a waste of effort and time?" Luo Jin smiled and left.

At this time, Lu Yingying walked into the office and said to Jiang Yiming: "Captain Jiang, we have conducted a lie detector test on Qiu Yinyin. The lie detector test proved that she did not lie. Should we let her go or continue to keep her?"

"Let her go, let her go immediately. We misunderstood her. The murderer is a man, it can't be her. By the way, apologize to her on my behalf." Jiang Yiming waved his hand and told Lu Yingying to leave quickly. He felt a little guilty.But solving crimes is like this. Under normal circumstances, many suspects have to be eliminated before the real culprit can be found. Cases that are solved instantly are rare, let alone high-intelligence crimes.

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"We have now proven that the suspect was hung from the rooftop to Room 1608 with a hemp rope to commit the crime. Then, this hemp rope must be thick and long. If the hemp rope is small, it is unsafe for the suspect. If the hemp rope is short, the suspect cannot Descend from the rooftop to room 1608. If the suspect wants to bring the hemp rope to the rooftop, he must use something like a shoulder bag, and it is a big bag. Therefore, we can look for the backpack in the hospital surveillance video. People. Are you right?" Jiang Yiming asked them.

"Yes, the diameter of this hemp rope should be more than 2.5 centimeters. The height of the 16th, 17th and 18th floors is 3.5 meters. The total is 10.5 meters. In addition, the other end of the hemp rope must be tied to the railing, which must be at least 2 meters. , Therefore, it can be judged that the total length of the hemp rope is more than 12.5 meters. If it is packed up, it will be very large and cannot be packed in ordinary packaging." Xiaoke said.

"This problem is easy to solve. Let's buy a hemp rope of the same size and length and try it to know its volume. The suspect may have measured it on the rooftop, or he may be very familiar with the building structure of the hospital, so I think Maybe it was someone inside the hospital who did it," Wu Jiang said.

"I agree with Angkor. Why did the murderer use hemp rope instead of nylon rope? Nylon rope is smaller and tougher."

"The murderer may be a frugal or low-income person. Because nylon rope is more expensive than hemp rope."

"Let's do this. Let Yingying and Xiaorou lead the investigation team to review the surveillance videos of the People's Hospital from September 9th to 29th. You two will continue to investigate Mou Pingjian's social background to see who has the motive for the murder."

"I'm worried that the suspect hid the hemp rope on the rooftop a few days in advance and then took it out to commit the murder when Mou Pingjian came to the hospital."

"No, how did the murderer know that Mou Pingjian would definitely come to the No. 1 Civil Hospital in the city?"

"If Mou Pingjian leaked the news, the murderer might have hidden the hemp rope in a corner of the rooftop in advance and then waited for an opportunity to commit the crime."

"If this is the case, it should be Mou Pingjian's friends or indirect friends who leaked the news."

"No matter what day the murderer brought the hemp rope to commit the crime, as long as he investigates the person carrying a big bag into the hospital, he will definitely gain something. If he takes the elevator, he will definitely be photographed by the surveillance camera, and if he takes the stairs, he will also be captured. People have witnessed that because many people are willing to take the stairs to wait for the elevator, so we can visit doctors, nurses, and patients while watching surveillance videos, and we will definitely gain something." Wu Jiang said.

"Okay, just listen to Lao Wu. The four of us will go visit the people in the hospital first. Yingying will lead the video investigation team to investigate the surveillance video of the hospital elevator. If there is no result, we will investigate Mou Pingjian's social connections to see who has committed murder. Motive. Zhou Ting, go to the canteen and buy a hemp rope with a diameter of 2.5 centimeters and a length of 12.5 meters. Put it in your shoulder bag and see how big the rope is so that we can investigate." Jiang Yiming said to Zhou Ting.

After a while, Zhou Ting bought a hemp rope and stuffed it into a bag so that there was no more space in the bag. Jiang Yiming measured the volume of the bag. It was 50 cm long, 30 cm wide and 40 cm high. , if a syringe for epinephrine is added, its volume will be larger.

So, the four of them went to visit the No. 1 Civil Hospital in the city.However, they visited more than 100 doctors and nurses for a day, but found nothing, because there were too many people coming and going in the hospital. Some people said they had seen someone enter the hospital with a backpack, but they did not recognize him.

The people from the visual investigation team watched the surveillance video for two days and found no suspicious people. However, they saw 28 people with backpacks or bags in the surveillance video. Lu Yingying and Wen Xiaorou both zoomed in on the faces of these 28 people, and then Take a screenshot, process the screenshot clearly, and print it as a photo.When Jiang Yiming returned to the team in the evening, Lu Yingying gave him screenshots and photos of 28 suspects and asked him to find ways to identify these suspects. If any of them had an intersection with Mou Pingjian, there would be great suspicion. The murderer was extremely It is possible that he is among these 28 people.

The next day, Jiang Yiming, Zhou Ting, Wu Jiang and Xiao Ke took a stack of screenshots and photos and went to the hospital to ask the doctors and nurses. After a whole day of questioning, they still came back in vain.Because most of the 28 people were unknown to each other, 6 of them were recognized. However, they were all family members of the patients, who came to bed with them carrying clothes on their backs, and they had no intersection with Mou Pingjian.

The case is deadlocked.Jiang Yiming felt that their investigation was in the right direction, but they had not yet asked the right person, or the witness had taken leave and did not come to work.There is another possibility: the suspect knew that the police would check the person with the backpack through the surveillance video, so he used a particularly secretive method to sneak the backpack to the rooftop, evading all witnesses and surveillance cameras.

"Zhou Ting, if the murderer used a drone to deliver the backpack to the rooftop, then we won't be able to get clues from the surveillance video or witnesses. Do you think this is possible?" Jiang Yiming asked.

"Well, it is possible, but the possibility is relatively small, because judging from the fact that the suspect did not buy nylon rope but bought hemp rope to save money, it is almost impossible for the murderer to buy a drone to commit the crime."

“What if he borrowed a drone from a friend?”

"Borrowing a drone carries the risk of leaking secrets. Moreover, if someone has not operated a drone, it is impossible to accurately land the drone on the rooftop of the 18th floor."

"It's easier to learn to operate a drone. I think it's possible."

"I still reserve my opinion."

Jiang Yiming ordered Wu Jiang and Xiao Ke to investigate Mu Pingjian's background to see who had the motive for murder.He and Zhou Ting continued to visit people at No. 1 Civil Hospital.

Jiang Yiming and Zhou Ting were going to visit and inquire from the second floor. When they walked to the second floor, they saw a male cleaning staff pushing a cleaning cart passing by. Jiang Yiming saw many white sheets on the cleaning cart, piled up in a mess, and his mind Suddenly an idea flashed: Will the murderer use the cleaning truck to take the bag to the rooftop?
Jiang Yiming walked up and asked: "Hello, we are from the Criminal Police Team of the Municipal Bureau. We need to know something from you. Can I delay you for a while?"

"You're too polite. It's what I should do to cooperate with the police in handling the case." He is of medium height, has short hair, and has deep wrinkles at the corners of his eyes. He looks 50 years old, but his face is red and full of energy.

"What is your name?"

"My surname is Li. Please call me Lao Li."

"Okay, Lao Li, how many male cleaners are there in your hospital?"

"There are 10 male cleaning staff and 8 female cleaning staff." He didn't understand why Jiang Yiming asked this question.

"Have you ever seen the cleaning staff hide a large bag in the cleaning truck and take it to the 18th floor?"

"I didn't notice that." He replied without thinking.

"If someone hid the bag in the cleaning van and took it to the rooftop, you wouldn't be able to tell, right?"

"Since you have to secretly hide it in the cleaning car and take it with you, no one will be able to see it... Officer, what is in the bag? It must be something very mysterious, right?" He asked curiously.

"This..." Jiang Yiming hesitated, not knowing whether he should tell him. After thinking for a while, he felt that he should tell him, "There is a hemp rope in the bag..."

"Hemp rope? A few days ago, I saw a delivery from Xiao Zhu in the guard room, so I took it to the dormitory and gave it to Xiao Zhu. I saw that it was written on the freight bill as hemp rope."

"What does Xiao Zhu do? What's his name?" Jiang Yiming came over alertly.

"Oh, he is also a cleaner in our hospital and lives next door to me. His name is Zhu Guzhong, are you interested in him?"

"How tall is he? What's his build? How old is he?"

"Height is about 172 centimeters, on the thin side. I am 40 years old this year."

(End of this chapter)