Ye Shu and Tan Xiao went downstairs to stop the car, leaving only the old man who was locked by the big iron door on the roof of the building, and the angry eyes behind many windows upstairs. It's not that they didn't hear it, but they dared to be angry and didn't dare to speak, because Tan Xiao's fierce feat of breaking the door twice a day had already suppressed them, and they didn't feel how strong their door was. The old man is now thinking even more, should that door be repaired?

The place where the accident occurred is not too far from the apartment, it takes more than ten minutes to take a taxi, it is a quiet community, there are more villas and bungalows, and there are no high-rise buildings. The deceased lived in a townhouse, at this time the cordon at the door has not been removed, there are police officers on duty nearby, when they saw Tan Xiao and Ye Shu coming, someone came to interrogate, Tan Xiao showed his ID and took Ye Shu across the cordon into the scene.

The villa was empty, and the nanny didn't know where they were sent, Tan Xiao turned on the lights in the room along the road, so that there was light inside, and there were no longer only mad people.

The swimming pool is on the basement floor, and the original scene is still retained at this time, with two beach chairs on both sides of the pool against the wall, and a table in the middle, but now there is no red wine as the nanny said. The underwater lights are still on, the water is very clear, and the starry sky pattern on the ceiling is even more beautiful, and if no one points it out, no one will believe that someone has just died here. There was no air conditioning or ventilation in the house, and the air was very humid and stuffy.

"Look, it's just a drain. When he arrived at the pool, Tan Xiao pointed to the pool and said to Ye Shu.

There was indeed only one drain in the swimming pool, and Ye Shu never doubted that Tan Xiao would count wrong.

Tan Xiao pulled Ye Shu down to a sunken space by the pool, where is the equipment room of the swimming pool, the area is not small, in addition to the swimming pool water treatment equipment, there are many other sundries, and the things are placed very neatly.

The water treatment equipment is very simple and old, with two circulating pumps, an old-fashioned sand tank, a gas heating furnace, and ultraviolet light and chlorine added to the dosing pump. Although the things are old, they are all imported equipment from the United States, and it seems that they have been used for many years. Even the power distribution cabinet is the oldest-fashioned, the start and stop are completely manual, and the only thing with a little automatic function is the temperature control equipment.

Tan Xiao pointed to the two pumps whose motors were obviously destroyed and continued to tell Ye Shu: "Look, both pumps are burning. He pointed to the hair filter with the lid open on the front end of the pump and said: "The epidermal tissue of the deceased was detected inside, it must have been caused by the deceased being sucked into the drain, and it is useless for you to deny it." ”

In the face of the facts, Ye Shu had no way to deny it, and looked around, the equipment room was very clean, much better than Sun Shuang's family. "The nanny of this house is good, and the cleaning is really clean. ”

"Yes, that nanny is good, beautiful and dry, and there is no dirt in the pipes and valves. Seeing that Ye Shu didn't defend himself, Tan Xiao thought that he had won, and his mood was much better, and he didn't hesitate to praise a few words.

The nanny was really conscientious in her work, and even the exposed pipes were wiped clean by her. Just looking at it, Ye Shu found the difference, the pipes were clean, but there was a slight drop of soil on the equipment, could it be that he was afraid that these equipment would leak electricity and be electrified, so he didn't dare to wipe it? Ye Shu was a little puzzled in his heart.

Walking around the debris, an automatic sewage suction machine was found in the middle of the debris, and other swimming pool cleaning tools were found on the other side, suction pool pipe, suction pool head, deep water net, shallow water net......

Well?

Ye Shu found that the suction pool throat and the suction pool head were relatively clean, as if they had been used recently, but why didn't they find the telescopic rod, how to use the telescopic rod without the telescopic rod?

Out of the equipment room, Ye Shu casually glanced at the pool, this location is close to the deep water area, close to the drainage outlet, and he can see it more realistically. When he saw the appearance of the drain, Ye Shu was stunned, and his brows furrowed again.

Tan Xiao followed behind, and saw Ye Shu staring straight at the bottom of the pool, and teased: "What are you doing? It's just a drain, you can see two of them if you look at it this way?"

"I can't see two, but I can see that the deceased must have nothing to do with this. Ye Shu didn't look away, his tone was full of excitement and unusual confidence.

Tan Xiao looked at Ye Shu, thinking that he couldn't afford to lose, and said: "If it's wrong, it's wrong, if there's anything you dare not admit, it's not your construction." ”

"I'm not wrong, it's you who are wrong. ”

"Why is it me who is still wrong?" Hearing Ye Shu say this, Tan Xiao was unhappy. "Tell me, what was wrong with me?"

"Do you see that drain clearly?" Ye Shu asked, pointing to the drain at the bottom of the pool.

"Nonsense, I'm not blind. Tan Xiao replied dissatisfiedly.

"Do you see the arc above?" Ye Shu then asked.

"What's wrong with that? Aren't all drains like that?"

Ye Shu didn't answer, just shook his head, looked at the pool wall under his feet, and then walked to the middle of the pool and squatted down, stretching his left arm into the water, as if he was fishing for something. After a while, Ye Shu's eyes lit up, and there was finally a smile on his face.

"What's wrong, what's the discovery?" Tan Xiao followed behind Ye Shu, keeping an eye on his movements, including his expression. All of Ye Shu's movements did not escape her eyes.

Ye Shu didn't speak, but looked around the room, room by room.

Seeing that Ye Shu didn't say a word and rummaged around, Tan Xiao was very unhappy, and shouted: "What are you doing? ”

"I don't rummage, I'm just looking for something. Ye Shu didn't stop, and entered another room.

"Looking for something?"

"A pole, six or seven meters long, stretches out, stretches out more than ten meters. ”

Knowing that Ye Shu was not fooling around, Tan Xiao no longer stopped him, but just followed behind Ye Shu step by step. After a long day's effort, Ye Shu finally found the telescopic rod mixed in the steel frame under the flower trellis on the first floor, but now the telescopic rod has been bent, and Ye Shu didn't take it.

"No, what do you mean?" Tan Xiao didn't understand what kind of style Ye Shu was smoking.

"What do you mean?" Ye Shu returned to the shore of the deep water area again, pointed to the drainage outlet and said to Tan Xiao: "This drainage outlet is not an ordinary drainage outlet, it has a curvature on the surface, that is, it avoids adsorption, although it has suction, it can't absorb people." ”

Ye Shu didn't forget to squeeze out Tan Xiao, "You see from the specifications that a drain is unsafe, but you don't know that there are many kinds of drains, including anti-adsorption, anti-swirl, and anti-pinching, this is not something you think you can understand by reading the book." ”

"What do you mean, but the pump is really suffocating, that's a fact. Hearing that the drain couldn't suck people, Tan Xiao knew that things were not so simple, and didn't refute the bickering again, but just raised questions.

"The pump not only has a drain port, but also a cleaning slot. Walking to the middle of the pool, Ye Shu pointed to the pool wall under his feet, "The one on the side wall here is the suction port, which is specially used to clean the pool." He walked back to the equipment room and pointed to the pipes and valves in front of the pump, "This thick pipe is the circulation pipe from the drain outlet, and this thin pipe is the sewage suction pipe from the sewage suction port." ”

"What's wrong with that?" Tan Xiao still didn't understand.

Ye Shu led her to the side of the sundries again, pointed to the automatic sewage suction machine and explained to her: "This is an automatic sewage suction machine, commonly known as 'water turtle', which can automatically clean the dirt on the pool wall when thrown in the pool." You see, I shouldn't have used it in a few days. Ye Shu walked to the other side again, "But look at these, these are traditional cleaning tools, manually operated, you look at the suction pipe." Ye Shu pointed to the pile of hoses, "Obviously someone has used it, if you don't believe it, you can take a look, there must be traces of water in it." You are looking at the head of this suction pool, there is no wheel, the bottom is flat, but it is cleaner than the 'water turtle', someone must have used it, the telescopic rod I found just now is connected to them, all bent, indicating that it has been subjected to gravity. ”

"And ......" Ye Shu went back to the water pump, pointed to the water pump and said: "These two water pumps are one for use and one for backup, and they have to be switched manually, but now they are burned at the same time, which means that someone started them at ......the same time."

After listening to Ye Shu's explanation, Tan Xiao gasped, and was still a little excited, "Is this a murder case? Did someone use a sewage suction device to suck the deceased and press it under the water?" Ye Shu said it so clearly, it was difficult for her to understand it, and at the same time, she raised her doubts, "But this is just our inference, there is no evidence to prove it." ”

Ye Shu smiled slightly, "You can actually detect the epidermal tissue of the deceased from the water pump, if someone killed it by that method, then it must also be detected from the sewage suction port, and you can also take samples at the drainage outlet to see if there is none." And there must be the murderer's fingerprints on the screw cap of the suction mouth, as for how to extract it, I don't understand......"

Without waiting for Ye Shu to finish speaking, Tan Xiao took out her mobile phone and called her captain, reporting the findings and speculations just now on the phone. In less than half an hour, Qin Chuan and a team of people came to the scene with tools. Like Tan Xiao, they are very excited to watch, they don't want a case to happen, but with a case, they don't want the murderer to go unpunished.