Detective: I can see the criminal record

Before Cen Lian arrived, forensic doctor Lin directly extracted fingerprints from the tool room door handle.

Her movements were not very skillful, after all, extracting fingerprints was not a necessary skill for forensic doctors, but she had learned some skills before, so she knew a little bit.

Cen Lian quickly arrived with the manager, and the manager's face was a little solemn after he opened the door of the tool room with the key. He had realized that this case was likely related to them, and that his position as a manager was probably over.

In any case, it was his own mismanagement.

There were many things in the tool room and they were messy. Some of the sundries piled deep inside were already a little dusty. Cen Lian saw the cleaning cart in the tool room at a glance. He and forensic doctor Lin almost subconsciously squatted down to measure the size of the blue barrel under the tool cart.

Forensic doctor Lin held the tape measure he usually used to measure the length of the corpse in his hand, and frowned immediately after measuring.

"It's deep enough to accommodate children under 1.3 meters tall." After repeated confirmation, she said solemnly, "If they were pushing the cleaning cart back and forth between the floors, they might have handed the child over directly to Zhang Bo you mentioned."

Cen Lian thought about it and still felt something was wrong.

"Do you have an elevator that is not for guests?" he immediately asked the manager.

"Yes, you need to swipe the employee's work card, but Yu Xiuying must have a work card..." The manager's forehead began to sweat.

He suddenly realized that this seemed to be a possible loophole.

Cen Lian and Lin, the forensic doctor, looked at each other and followed the manager to the elevator.

"Have you given the surveillance video here to the police before?" Cen Lian asked.

"No, this is the elevator our staff usually use to transport goods and the like." The manager's sweat could no longer be stopped, "I'll go get the surveillance now."

Cen Lian stretched out his hand to stop him.

"Don't worry, gather all the cleaning carts in the entire mall first. We need to check and sample, but I have to trouble you to think of a reasonable reason, try not to alert the enemy, so as to avoid any danger to the children in their hands." Cen Lian's brain was working fast.

The manager wiped his sweat and left.

Forensic doctor Lin glanced at him and said, "I will contact Wu Qiushan and others, you go to adjust the surveillance."

She knew that Cen Lian wanted the surveillance of the underground garage more now, because if the person was transported down from this elevator, it is very likely that he was taken out through the underground garage.

When the Xicheng Branch investigated before, it did not consider the direction of internal staff committing the crime. If Cen Lian had not seen the text bubble above Yu Xiuying's head, it would be difficult for them to directly suspect a cleaning staff who clocked in at the mall every day.

The group of the support squadron was already in an uproar at this time. Wang Yuanteng and Qi Yan were still asking questions and did not appear in the group for the time being. However, the group that followed Wu Qiushan out also gained something.

Although this gain currently seems to have nothing to do with the child disappearance case.

Wu Qiushan found a small bag of drugs next to Yu Xiuying's rental house.

If Cen Lian had not confirmed that the landlord was a good person, they would have taken the landlord away immediately.

Of course, the landlord was still taken away, but he was just given a more pleasant explanation.

Assisting in the investigation.

While waiting for the staff to retrieve the surveillance, Cen Lian took a look at the current situation in the group.

The people Wu Qiushan and his team brought back were directly handed over to the anti-drug brigade, which had only two people on duty, and then fled the scene like a fly.

At the end of the year, send a few drugs to the anti-drug brigade, that is to send warmth at the end of the year.

During the New Year holiday, ahem, we are all comrades, we can't fight.

Cen Lian watched Wu Qiushan instruct Tang Hua and Yuan Chenxi to run away quickly in the group, and drove away before the on-duty personnel of the anti-drug brigade chased them out.

"It's just right, you come over to help extract DNA." After Cen Lian sent a message in the group, he saw that all the surveillance videos had been copied out.

The video of the underground parking lot had been retrieved by the Xicheng Branch before, and Cen Lian specially requested another copy to prevent accidents.

When Wu Qiushan and his team arrived, the mall manager had already gathered more than 50 cleaning vehicles on the six floors of the entire mall, saying that "the New Year is coming, and all cleaning vehicles must be decorated with the Year of the Dragon."

These cleaning vehicles are basically mixed, and it is impossible to determine which one Yu Xiuying used on the day Du Lingling disappeared.

"The job you assigned us is not easy," Wu Qiushan observed the cleaning vehicles and asked Tang Hua to help unload all the barrels and number them. "Yu Xiuying's home has nothing, only she has traces of living alone, and the child is not hiding in her home."

Forensic doctor Lin also came to help. These barrels are cleaned many times almost every day, but if a child is hidden in them, there may be traces in some places that are not usually cleaned.

For example, the gap between the barrel cover and the gap inside the barrel wall.

Yuan Chenxi and Tang Hua are extracting traces from these places.

Wu Qiushan squatted in front of a cleaning cart and carefully observed the frame.

"According to the information provided by Du Lingling's parents, their daughter has long hair. According to the structure of the cleaning vehicle, it would be rather difficult to dismantle the bucket and then put the child in. It is more likely that the lid of the bucket was opened directly and the child was stuffed in. Then there might be the child's hair on the gaps in the frame." Wu Qiushan seemed very confident when talking about the traces. He didn't say much to Cen Lian and chose to extract it directly.

Cen Lian watched for a while, and saw Wu Qiushan's thinking from his operation, so he simply took out a set of tools from the investigation box and operated in other frames.

When Tang Hua straightened up and moved, he took a look and happened to see Cen Lian's operation.

He was silent for a while and turned his eyes to the side.

I don't know when he got used to it.

When Cen Lian helped Wu Qiushan to extract, Lin, the forensic doctor, had already walked around the underground garage.

"In fact, this kind of cleaning cart is not often used in places like shopping malls. I suspect this is why Yu Xiuying targeted the Xicheng Shopping Mall," she touched the reassembled cleaning cart, "This kind is more commonly used in hotels."

"You really guessed it right. This batch of cleaning carts was left when a hotel under our company closed down. They were all brand new at the time. They were not given to us to save a little cost." The manager looked at the batch of cleaning carts and felt a little desperate. "If I had known earlier, I would have asked to purchase another one anyway."

After hearing what he said, Cen Lian saw that there was indeed a company emblem on the cleaning cart.

"Is Yungong Hotel also a subsidiary of your parent company?" he asked curiously.

The manager nodded immediately, "Our parent company is called Yuntong Group."