double secret

In the discussion room, the atmosphere finally returned to calm.

After being disturbed by the lantern girl's mother, most of the people fell asleep, and another kind of heavy pressure weighed on everyone's heart: they really need to find the murderer quickly.

Xiao Cai, who sent everyone back to the police station, brought back a big cup of black coffee, and asked everyone who worked overtime to sadly remind his teammates to drink.

Tang Sheng, who was not used to drinking that stuff, waved his hand and refused, and took a sip of strong tea: "Cui Di, please tell me."

Cui Di nodded, stood in front of the big whiteboard and cleared his throat.

On the whiteboard are photos of the three victimized children and photos of various related stakeholders. Arrows indicating the relationship, time, location and other information are densely covered the entire page.

Cui Di picked up a red pen and drew a circle on the photo of the boy on the swing: "We can basically conclude that the boy did not buy ice cream from the joint surveillance video based on our previous visits."

"But must the murderer have bought ice cream near the crime scene before the crime? Perhaps we have fallen into a misunderstanding."

"As long as the ice cream is stored with the corresponding equipment, it will not melt wherever it is taken. When I was a child, the hawker who walked around the streets to buy ice cream could complete the storage with a quilt."

Tang Sheng felt that what she said was quite reasonable, and drew a sketch of the refrigerator in his notebook. He was thinking, who can own these devices?Did you miss something during the previous visit?Or has anyone lied?

Tieniu scratched his head: "You mean, the murderer brought a refrigerator with him?"

"Or an insulated device smaller than a refrigerator, or even a well-insulated thermos cup, is possible, so to speak."

"In addition, there is another point that we have overlooked, and that is the wariness of modern children."

"The three children involved in the incident have all gone to primary school. Although they are still children in terms of legal age, they already have the ability to recognize people and objects. I asked the parents of the boy on the swing, and they also said that they had Carefully teach children not to talk to strangers, let alone eat things given by strangers. If they are young, they will not be easily abducted.

"However, this little ice cream boy ate it unsuspectingly."

Cui Di's words made everyone break the inherent boundaries of thinking.

"Does this mean...the murderer may be someone the children know?" Xiao Cai asked hesitantly.

"Or someone who can let the children let down their guard naturally." Tang Sheng pushed aside the chair and stood up, "Go and check the middle-aged people who are close to the parents of these children to see if there is any intersection. In addition... "

He pondered over it.

"There are also old people, especially those who often come into contact with children." Liu Ming took the conversation.

"Yes!" Tang Shengmao suddenly realized, with a smile on his tired face, "The old man has low physical strength, as long as he is kind, the children will not be wary!"

Squid, who had been sitting silently on the side, suddenly frowned: "Speaking of which... I seem to have seen someone who meets the above requirements on surveillance?"

Everyone's eyes suddenly focused on him.

Squid tried his best to recall it again, then nodded solemnly, "Yes, I must have seen it, I have an impression."

He turned on a computer in the corner, which was specially used to store and call back monitoring files in the department. It could be directly connected to the projector in the department for all members to watch together.

Tweedy pulled down the projector's curtain, turned off the lights, and the room was plunged into darkness.

A beam of light is shot from the projector onto the screen. In the light, countless dusts are flying under the strong light, and the trajectory is messy and graceful.

"Crack, click." The sound of the squid tapping the mouse echoed in the room, worrying about everyone's hanging heart.

The optimized surveillance video starts to play.

Everyone stared at the curtain intently. These surveillance videos have been watched countless times, but everyone still widened their eyes, hoping to dig out some clues from it.

"I remember... right here..." Squid said to himself, while dragging the progress bar to a certain afternoon.

The neighborhood where the swing boy lived appeared on the curtain. It was a sunny afternoon, and the warm sun shone on every street.

On the road, many old people and children are resting and playing in the small park, and occasionally a few food delivery bikes pass by.

The time passed by one minute and one second, pointing to 14:35.

Everyone held their breath. The boy's death time was about 15:55. According to their speculation, the murderer must have appeared in this community from 14:35 to 15:55. This record is also Police officers are the most watched repeatedly.

The children in the small park were still playing hide and seek, and everything was normal.

Seeing that the progress bar was coming to an end, disappointment slowly spread in the room.

At this time, a chubby kid among the children cheered: "Grandpa Ice Cream is here——!"

The children exploded immediately, the hide-and-seek stopped, and everyone ran towards the road at the entrance of the park in unison.At the end of the narrow path, a figure pushing a tricycle came into the sight of the police officers.

It was a man with half-white hair, his back was very straight, and he didn't have the hunchbacked look of an ordinary old man at all, making it easy for people to mistake him for an ordinary middle-aged man if they didn't pay attention.The man was pushing a tricycle with a height of half a person, and the things on the back seat of the car were covered with thick mattresses.

Seeing the child running, the man seemed very happy and stopped immediately.

The little chubby dun'er took out a five-yuan bill from his pocket, skipped and handed it to the man.The man took the banknotes and opened the mattress on the back seat, revealing what was under the mattress—it was a square old-fashioned freezer, with a yellow-green outer skin and yellow sealing plastic strips revealing a sense of age.

The old man opened the lid of the freezer, took out a white popsicle from the freezer, and handed it to the fat man.

This is an old man selling ice cream, with a sincere smile, kind enough to make people ignore that he has lethality.

Everyone couldn't sit still, stood up and stared at the screen in a daze.

After the old man sold ice cream to all the children, he changed the lid of the freezer again and covered it with a mattress. When he was moving, something between the mattresses reflected the sunlight, and the light flashed.

"Wait a minute! What was it just now!" Tang Sheng snapped at the squid with sharp eyes, "Drag the progress bar forward for a few seconds and zoom in."

Squid did as he said, and the flashing moment appeared on the screen again.Tang Sheng took out a cigarette case, put one in his mouth, and lit it with trembling fingers. Under the light of the fire, his face was as white as a piece of paper.

Although it was only for a moment, this time Tang Sheng also captured the true face of that thing.

It was a knife.

saber.

It shouldn't belong to an ordinary family, something that an old itinerant peddler selling ice cream would have.

"I know why those tooth marks can't be found in the dental records. Those are false teeth!" Sunan suddenly said, like a traveler who has found a treasure, and excitedly grabbed Liu Ming's arm, those buried in his mind His doubts were suddenly revealed at this time!

The teeth and dental arches of different individuals have different individual characteristics, and the probability of duplication is extremely low.In addition to excluding the murderer who has never seen a dentist in his life, there is another possibility that this is the case. Therefore, the bite marks look deep, but they did not break the dermis because the bite force was not strong enough.