Lan Lan's mobile phone call record has a strange phone number, this number only has three call records, and all three times are with Lan Lan, and all of them are on the day of Lan Lan's disappearance.

The first call was when Lan Lan had just left the house at noon; The second time was around two o'clock in the afternoon, when Lan Lan was visiting the mall; The third call was at three o'clock in the afternoon, when Lan Lan came out of the south gate of the mall. The number that spoke to Lan Lan was shut down the day after Lan Lan disappeared.

Obviously, this is the mobile phone number that the murderer specially used to commit the crime, and after querying, it was found that this mobile phone number really belonged to the "black card", there was no real-name registration, and there was no owner information in the communication company. There is also such a strange phone number in the mobile phone call records of the other 4 young ladies, and each number is different.

This kind of "black card" is already difficult to handle through formal channels, but through online stores or virtual operators, you can find a large number of sources to choose from.

Therefore, this clue cannot be pursued.

Yongcheng police retrieved the surveillance of the mall that Lan Lan patronized before her disappearance, and after some searching, the police officer in charge of watching the surveillance half-jokingly told Li Zhudao: "This Lan Lan disappeared a little mysteriously, I don't know if there is some supernatural incident." ”

Li Zhudao felt that this was a fantasy, but after understanding the basic situation, he felt incredible: how could a big living person disappear on the street in broad daylight?

The monitoring shows that after Lan Lan came out of the south gate of the mall, she walked to the side of the busy road, and it was at this time that Lan Lan walked out of the monitoring range and then disappeared out of thin air.

There is a surveillance 25 meters away from the south gate of the mall, and the probe can just shoot part of the area in front of the south gate of the mall. After careful inspection, there was indeed no Lan Lan in the picture. The probe closest to the mall on the west side was installed in front of a nearby hotel, and this probe could photograph the entire sidewalk from the south gate of the mall to the west, and there was no Lan Lan on this sidewalk.

Lan Lan walked out of the mall from the south gate, neither to the east nor to the west, could it be that she grew her wings and flew away?

Instead of believing in ghosts and gods, we should believe in the greed of human nature and the bottomless crimes that break through imagination in order to satisfy desires. Many times, human nature is more terrible than ghosts and gods.

Li Zhudao firmly believes that there must be something that the police have overlooked, and it is impossible for a big living person to mysteriously disappear in a place where surveillance is everywhere and the flow of people is so dense.

So, Li Zhudao, Liu Chaogui, and Xiao Wu went directly to the mall.

In the surveillance, Lan Lan came in from the south gate of the mall alone, and when she left, she also walked out from the south gate alone. During this time, Lan Lan stopped at several shops selling women's underwear, cosmetics and jewelry.

The shopping guides who had contact with Lan Lan in these stores told Li Zhudao that Lan Lan only selected the goods in these stores and briefly asked the price, but in the end she didn't buy anything. After Lan Lan left, the shopping guides never saw her again.

Li Zhudao walked out of the south gate of the mall, looked at the scene of traffic in front of him, stayed for a while, first walked twenty or thirty meters to the east, looked up and saw the monitoring on the east side of the south gate, and then returned to the south gate of the mall, continued to walk more than 100 meters to the west, and finally saw the probe in front of the hotel.

Outside the south gate of the mall, the monitoring on the east and west sides is nearly 150 meters apart.

"Please check again with the comrades in the team, whether there is still a monitoring blind spot outside the south gate, Lan Lan should have disappeared in this blind spot." Li Zhudao said to Liu Chaogui.

The technicians quickly got feedback: there was indeed a monitoring blind spot about 50 meters long in front of the south gate of the mall.

This blind spot immediately became the focus of the investigation.

If Lan Landa is kidnapped, robbed, or abducted on the street in the blind area during the day, it will definitely be seen by pedestrians on the street or the staff and customers in the shops along the street, and not a single person will call the police. Even if this were the case, it would not be possible for everyone to open their eyes and tell nonsense, saying that they had not seen any sudden violence at that time.

Therefore, Li Zhudao speculated that Lan Lan was likely to enter a certain store in the blind spot, and then "disappeared" in this store.

So, the three of them began to visit the shops and people in the blind area.

There are four relatively large shops in the blind area.

One is an Internet café, the entrance is located on the first floor, and the second floor is the game area; One is a restaurant that sells rice noodles; One is a fishing tackle shop; There is also a coffee shop. The waiters at the restaurant and coffee shop told Li Zhudao that they had not seen Lan Lan in the photo. The customers of fishing tackle shops and Internet cafes are usually male, especially Internet cafes, most of the customers are students, and the owner and the front desk also said that they have never seen Lan Lan.

In other shops, they also said that they had never seen Lan Lan.

Liu Chaogui sent the personal information of the shop owners and clerks back to the police force, and after screening them, his colleagues told them that these people had no criminal records, which means that it is unlikely that these people committed crimes or lied.

After a visit to these shops was fruitless, the manhole on the road in the blind spot attracted Li Zhudao's attention again. It is impossible for Lan Lan to grow wings to go to the sky, but it is possible to fall into a manhole and drill into the ground. On this section of the road, it just so happens that the manhole covers of some underground manholes are missing, and only a circular hole with a black hole is exposed on the road.

Li Zhudao immediately called for sanitation workers in charge of this section of the road. Under the guidance of the sanitation workers, the trio drilled down and carefully searched each manhole, but the results were still disappointing, and no abnormalities were found in the manholes.

Pedestrians, vendors, shops, manholes, and all kinds of situations that may occur in the blind area have been investigated. It's not in the monitoring range, and there's no blind spot, so did you cross the road and walk to the opposite side?

This is highly unlikely. There is also a large mall across the road, but there is a wide road with 12 lanes in both directions, and there is a green belt and guardrail in the middle of the road, so it is difficult to cross it.

Just in case, Li Zhudao still asked Xiao Wu to check the monitoring of the opposite shopping mall, but the result was still as expected, the monitoring of the opposite shopping mall did not appear Lan Lan's figure.

Li Zhudao squatted on the road in the blind area and smoked a cigarette, until a taxi stopped two or three meters away from him, the door opened, and a pair of long legs with black silk stretched out from the car, and then these long legs kicked a pair of high heels and walked into the mall behind him, Li Zhudao suddenly realized, and then smashed the cigarette butt on the ground: "It's so simple, I can't even think of ......"

There is no bus stop in the blind area, and after Lan Lan came out of the south gate of the mall, she did not go east or west, but should have taken a private car or taxi on the side of the road.

The middle of this section of the road within the blind spot is a green belt, vehicles cannot turn around, and the road is east-west, after Lan Lan came out of the south gate of the mall, on the side of the road where she was, she could only carry vehicles from west to east.

Li Zhudao and the others immediately returned to the police station.

According to the time recorded by the "black card" phone and Lan Lan's last call, the technicians first checked the taxis that passed through this section of the road at about this point in time. Li Zhudao believes that the murderer is very likely to make an appointment with Lan Lan to get into the car through a "black card" phone.

There are nearly 30 taxis that have been investigated, and after the personal information of these taxi drivers is retrieved, the police believe that they are not very suspicious, because they are all men, and the fingerprints on the plastic bag wrapped in "fried liver" have directly locked the suspect as Qin Rongrong, a woman.

But Qin Rongrong may also have taken a taxi to pick up Lan Lan outside the south gate of the mall, and the police had to invite these dozens of drivers to the police station to let them identify the photos of Qin Rongrong and Lan Lan, but they all said that they had not driven these two women and did not know them. These drivers do not have any call records with Lan Lan or "black card" phones in their mobile phones, and their daily trips are also completely checkable.

This can only continue to check private cars. What makes people's heads big is that during the time period when Lan Lan disappeared, there were not 1,000 but 800 private cars of all sizes passing through this section of the road. What's even more maddening is that the surveillance footage of this section of the road is very blurry, and the license plate number is not clear at all.

Li Zhudao and a group of case-handling personnel sat in the office, staring at a car that flashed quickly on the screen, speechless to the extreme. Knowing that Qin Rongrong and Lan Lan were among them, but they couldn't find out which car they were in, this feeling of powerlessness was like having severe constipation, which made people panic.

Theoretically, Lan Lan's disappearance is only possible to leave in a private car. Everyone knows this.

Handling a case is like finding a key to open a lock, in the past, there was a lock, but the key could not be found, but now it is good, the key to unlock the lock is found, but there are thousands of locks......

Li Zhudao stared intently at the fleeting vehicles in the picture, and the picture of the endless flow of vehicles kept pouring into his mind: speed...... Distance...... Velocity......

Li Zhudao suddenly had a flash of inspiration and found a wonderful way to screen out that lock:

"The length of the blind spot is fixed, and the length is not large, only about 50 meters, and the speed of the vehicle through this section is basically the same, which means that the time it takes for each car to pass through this section is basically the same."

"One of the cars picked up Lan Lan in the blind spot, which means that the car must have had a short stop in the blind spot. If you calculate the time for each car to pass through this section of the road, the car that obviously took more time to pass through this section should be the car that picked up Lan Lan, and Qin Rongrong should also be driving this car. ”

After a pause, Li Zhudao added: "Qin Rongrong does not have a registered vehicle in her name, and the car she is driving is likely to come from the wrong way, or it is registered in someone else's name." ”