The rooftop in front of me is empty, the building has just been delivered, and the occupancy rate is just over half, and both residents and tenants are concentrated below the 20th floor.

Above the twentieth floor, there are only a few scattered households.

After a while, Xue Hang suddenly made a discovery.

"I seem to know how the murderer got down."

We looked back at him together, and there was a built-in indoor fire hydrant on the wall in front of him.

Xue Hang put on his gloves and opened the fire hydrant, which contained a roll of fire hose.

"You mean, the murderer rappelled with a fire hose?" We walked up to Xue Hang, looked at the fire hose inside, and asked.

"The normal size of the fire hose is 25 meters, and it is very enough to lower two stories from here, and this is the only way I can think of to descend." Xue Hang said coldly.

Jiang Tingbai immediately stepped forward to check, pulled out the fire hose, and tried to find clues on the fire hose.

Jiang Tingbai kept pulling the fire hose to the wall of the rooftop, simulating the situation of the fire hose when the murderer descended.

Soon, he noticed that there were obvious friction marks on the fire hose at the edge of the rooftop wall, and there were also tiny rubble attached to it.

"It's very likely that the murderer was rappelled down through the fire hose." Li Meng nodded seriously and said.

"The murderer even used the rope drop, which shows that his purpose is very clear, that is, he came to the deceased, and it is very likely that an acquaintance committed the crime." I looked at the fire hose in front of me and muttered.

"I'll give it a try." Xue Hang took a deep breath, stepped forward quickly, picked up the fire hose and wrapped it around his waist, and tied a dead knot.

"Wait a minute, what are you going to do?" I hurriedly grabbed the fire hose and looked at Xue Hang seriously.

Xue Hang was expressionless, looked at me seriously, and said lightly: "It is very likely that the murderer entered the house to commit the crime by lowering the fire hose, but this is a guess, so I have to determine the possibility of this way of descending." ”

"This ...... Fifty-two floors, if you fall down, it will become a photo, no, no. Li Meng also stepped forward quickly, grabbed the fire hose, and prevented Xue Hang from using this rope dropping method.

"Xue Hang, I know your physical fitness, and I also know your reason for doing this. However, you have to test it when it is safe to do so, and I will now ask the bureau to take a set of rope drop equipment, and after ensuring your safety, you can use the fire hose to do the rope drop. Lin Zifan also stepped forward to dissuade Xue Hang.

"Yes, yes, now it can be judged that the murderer entered the scene of the crime by descending, and that is enough, we still have many ways to solve the case." Jiang Tingbai also felt a little frightened, and stepped forward to persuade him.

Xue Hang looked at the serious expressions on the faces of the four of us, revealing a firm and confident look: "The murderer went down like this, which means that it is safe to descend like this, don't worry." ”

After speaking, Xue Hang continued to wrap the fire hose around his body.

"You're right, but when the murderer descended, the fire hose was new, and if he used it once and it was damaged, it wouldn't be safe for you to use." Li Meng said with some concern.

"I've checked it all, don't worry." Xue Hang didn't listen to us, and after wrapping the fire hose, he walked up to the fence of the rooftop.

Then, under our watchful eye, he descended slowly in a very standard way of abseiling.

The four of us lay on the rooftop together, looking down.

Not to mention the rope drop, the height of this fifty-two story building, just looking at it makes me feel dizzy and scared, this kind of visual impact is not something that ordinary people can bear.

Xue Hang was not in a hurry, and slowly turned his body very steadily, so that the fire hose around his waist continued to be released, and he successfully descended to the height of a fifty-story building.

"Holy!"

In the next second, an exclamation from a technical team officer came from the room where the crime occurred.

Immediately afterwards, two pairs of hands stretched out from the window to catch Xue Hang, but Xue Hang refused. Xue Hang's waist was forced, and the fire hose swayed slightly.

Xue Hang stepped on the windowsill with both feet, bent over and walked his legs, and entered the scene of the crime through the window.

After seeing Xue Hang enter the room, the four of us breathed a sigh of relief, quickly left the rooftop, and returned to the room where the crime was found.

We were all frightened, but Xue Hang's face was not red and his heart was not beating, his face was expressionless, and he was very calm.

Xue Hang looked at the fire hose on his waist, pondered for a while, and turned around to go to the windowsill.

We hurriedly stepped forward to stop Xue Hang, untied the fire hose around his waist together, and said a little nervously: "Okay, okay, you can go up if you can come down, you don't need to test." It doesn't matter how the killer left, just know how he got in. ”

"Although this kind of rappelling is not very difficult, it requires professional training, especially when the vision is blocked at night, and the impact of this fear of heights." Xue Hang untied the fire hose around his waist and said seriously.

"The killer had experience working at height...... Could it be Spider-Man? Li Meng frowned and hurriedly asked.

Spider-Man, generally refers to those workers who climb on the exterior walls of high-rise buildings in the city to carry out cleaning work, because they can make good use of various safety equipment and their own balance ability to stay on the side of high-rise buildings, like spiders, so they are called spider-men.

"When the spider man is working at height, he will have a safety rope and an operation rope, and the safety factor is very high. The murderer only relied on a fire hose and roped into the house at night to commit the crime...... Just for theft? Jiang Tingbai took a deep breath, a little incredulous.

It's really an unbelievable thing, and even a normal person wouldn't do it. If he commits a burglary at the cost of his life, then what he wants to steal is more important than his life.

Not only that, but the thing that is more important than life is what the murderer must get. If you can't get it, it's no different from death.

Because, it is very likely that the murderer died because of the fire hose breaking before he could enter the room.

"The murderer had experience in working at height, and he was a person who had been working at height for a long time. It could be a stair cleaner, a tower crane worker, a construction worker, or even an adventure enthusiast, a rock climber. The murderer had a lot of trust in his own abilities and absolutely believed in the load-bearing capacity of the fire hose, and it is very likely that he had experience with a fire hose before. Li Meng slowly analyzed.

Immediately afterwards, she added: "I haven't thought of a more detailed criminal profile yet, and after determining the identity of the deceased, as well as the deceased's occupation and social relationships, I will make a comprehensive judgment." ”