Liu Chen's pupils widened slightly.

He immediately leaned against the wall, pulled out a flashlight, then lifted his foot and took off his shoes.

By the light of the flashlight, he saw that in the cracks of his shoes, there were some small black spots, the same as the dirt found by the police, which he had stepped on when he entered.

Liu Chen put down the flashlight, thought for a few seconds, then put on his shoes and said to the police officer who had just come up: "You go and inform the brothers, so that everyone can see if the soles of their shoes are sticky with mud." ”

Then, he beckoned to the two police officers on the side, as well as Zhou Yan and Li Huan: "Let's go, let's go to the first floor and have a look." ”

In this way, several people quickly arrived on the first floor, and at this time, the lights in the hall on the first floor had been turned on, and it was estimated that a certain police officer had found the power switch.

Moreover, the police officers didn't know where to take out a few lights, illuminating the ground on the first floor.

The ground on the first floor of this office building is not tiled, and it is still in a 'rough' state, so the mud chips have seeped into the rough cracks of the concrete floor, and under this light, everyone can finally see clearly.

Liu Chen squatted down and pinched up a few grains of mud with his gloved hands, which were soft and black.

"This kind of dirt...... Where did it come from? He muttered to himself.

Suddenly, a police officer approached again.

"Detective Liu, we met this person nearby, his behavior is very suspicious, and he has been wandering around."

As he spoke, an uncle in his fifties was brought over.

This person is not tall, more than 165 points, beer belly, thanksgiving, and a smell of alcohol on his body.

"Who are you?" Detective Liu got up and asked.

"I ...... I ......" The man was obviously flustered and hesitated for a long time: "I'm here to guard the door." He finally spoke up.

"Oh? Gatekeeper? ...... That's the police brother, you go to the guard room to take a look, do you have any photos of his work. Detective Liu said to a police officer on the side.

The officer went and came back quickly, still holding a one-inch photo taken from the duty schedule.

It is this uncle.

Liu Chen glanced at the photo: "It's not posted recently." ”

"It's not!" The officer said simply and clearly.

Well, looking at it this way, this uncle should really be the doorman.

Detective Liu stared at the uncle again and asked, "What are you wandering around?" ”

"I just went out...... After dinner, as soon as I came back, I saw a police car, so I was a little scared and wanted to see what was going on nearby? ”

Liu Chen looked at the other party's frightened look, and smelled the wine on his body again: "Eat?" How can you eat until this time? His voice was deliberately raised.

This scare, the janitor was also shocked, and quickly admitted: "I'm sorry, I'm sorry, I'm supposed to be on night duty in the janitor's room, but I ran out to drink." ”

"Tsk, don't stick to your post, do you know that someone in your building just died?"

This sentence scared the uncle so much that he couldn't stand firmly: "Death...... Dead? ”

"Well, someone will tell you the details when you make a transcript. And since you didn't know where you had just gone, you're going to have to be investigated. But let's not talk about that for now......"

As he spoke, Liu Chen pointed to the ground behind him: "Do you know what this is?" ”

Uncle Xie Ding was stunned: "This ...... This is the earth. ”

"Tsk, I'm not asking you about the ground, I'm asking you about these little mud crumbs on the ground." While speaking, Liu Chen took out the small plastic bag containing soil from his pocket: "This, do you know what it is?" ”

The uncle looked at the plastic bag, but he didn't hesitate: "I know, this ....... This is flower clay. ”

"Flower mud?"

"Hmm." The man nodded: "Yesterday afternoon, a few people moved a large pot of flowers, it is estimated that it must be so big!" As he spoke, he measured it with his hand: "But as soon as he entered the door, one person did not hold it, and it was broken, and the flower mud was scattered all over the ground." ”

"And after that?"

"After that, I'll clean it, what else can I do, until I get off work, and finally clean it."

"I see." Detective Liu nodded.

There is no way to sweep all of this kind of untiled floor, at most it is passable to the naked eye. So, a lot of fine mud and slag were all left.

And because it is 'swept', the coverage of these mud ideas is very large, and you will definitely step on it as soon as you walk by.

Thinking of this, Liu Chen took out the slippers again, and at this moment, the shoes had been put into a special evidence plastic bag.

Through the bag, Liu Chen made sure that there was no dirt stuck to the shoes.

That's weird.

If the flower pot was broken yesterday afternoon, then when the deceased climbed onto the roof today, the shoes must have been stuck with mud.

But...... No.

In other words, the deceased was on the rooftop before yesterday afternoon.

But why did he go to the rooftop yesterday and jump off the building today?

Or is there something else going on in this case?

Also, what the hell is this strange pair of slippers? How could anyone walk back and forth in such slippers?

The case, which was originally quite easy to handle, seems to have a lot of problems at once.

"Hey~" Liu Chen said to the janitor again: "Do you have a camera here?" ”

The uncle shook his head: "We are all decades old buildings, who will have a camera." ”

"That'...... In the past few days, have you seen any strange people entering the building? ”

The uncle still shook his head: "No." ”

But he said no, but the actual meaning should be...... I didn't even look at it.

Originally, how could he be conscientious every day in a job like his, it was just a mess, as long as someone didn't push a barrel of explosives inside, he probably wouldn't have paid attention at all.

Liu Chen also seemed to realize this: "Okay, let me change the question, have you ever been on the rooftop in the past few days?" ”

Uncle still shook his head.

"Well, sure enough, asking is the same as not asking." Liu Chen thought of this: "Okay, take him over to make a record, remember, don't let him go when you're done." ”

Liu Chen, as always, did not let go of anyone related to the incident.

In this way, the case seems to have reached some kind of deadlock.

And at this time......

"Right..... Sorry, I have a question. A voice rang out suddenly.

Everyone turned their heads and looked in the direction of the sound, and found a very quiet Li Huan slowly raised his hand, as if he was speaking in class.

"What's the problem?" Liu Chen was stunned and asked.

Li Huan hesitated: "If the deceased jumped from the 12th floor, would he be so close to the building when he landed?" I think the location of the corpse is only about 1.5 meters from the wall. ”