Bro, you are a policeman, not a thug.

"The monitor was hacked and the source could not be traced. The network used the WIFI of the daily rental house."

Zhao Xiaotang reported with a stern face, "The daily rental house registration is the identity information of a person from a certain province, which cannot be traced through illegal channels... The other party's anti-reconnaissance capabilities are not generally strong, leaving no clues, not even traces."

This is also expected, the person who can do this case cannot be an idiot!

At this time, everyone else was looking at Xiao Mu who was smoking silently.

"Have everyone else from the Jinling Criminal Police Brigade checked?"

Xiao Mu blew out a smoke ring.

"Checked."

Dong Ruicheng smiled bitterly, "I haven't appeared in certain places with the four victims, or done certain things... I have tested it, and I didn't lie."

"Is it possible that the other party only wants to kill four people?"

Xiao Mu tilted his head and looked out the window, "That's weird, what did these four policemen do?"

What should I do if I have no clues?

The same can be reasoned!

In fact, the two most obvious clues have already emerged.

1. If the perpetrator is an "accident maker" and they are a team, the person who can hire them should be a "big shot". It is impossible for ordinary people to have access to this kind of profession.

2. The death of the four policemen may be related to some kind of cause and effect. Otherwise, how free would the big shot be before he killed them?

The focus is on ‘cause and effect’.

What did these four policemen do? Perhaps they did something unintentionally, or they knew, saw, or heard... there are many possibilities.

Where should I start looking for clues next?

Xiao Mu entered a certain state in his crazy reasoning.

He began to review and consider the four cases, and all the information began to be crazily pieced together and integrated in his brain.

Time is passing slowly.

Xiao Mu has never been able to deduce reliable clues.

"Go get something to eat first."

Zhao Xiaotang shouted to wake up Xiao Mu who was reasoning.

"good."

Xiao Mu came back to his senses, his eyes showing exhaustion.

Everyone walked out of the apartment together and took the elevator downstairs.

Just walked out of the unit door.

Sudden.

Xiao Mu's pupils shrank, sensing danger.

The strangest thing was that he didn't sense any murderous intent or the source of danger.

What the hell?

Xiao Mu stopped and looked around.

Huh?

His eyes were fixed on one place.

A dozen meters away, there was a child of seven or eight years old.

A surprising scene appeared.

The child held a lighter in one hand and a pack of cigarettes in the other.

Does he want to smoke?

No, the child just lit the cigarette.

Then he squatted down in front of a sewage manhole cover.

Stretch out the hand holding the cigarette and slowly extend the cigarette towards the small hole in the manhole cover.

Xiao Mu's eyelids twitched, his brain boiled, and he began to calculate frantically.

Calculate steps, calculate time, calculate the direction of people’s walking...

If he hadn't sensed danger, they would have walked toward the child at this point.

And that child just happens to throw the lit cigarette into the sewage well.

And then...

The power of imitation - the flea.

Bang, there was a shaking sound under Xiao Mu's feet, and his figure disappeared from the place.

When he appeared, he was already squatting in front of the child.

The cigarette was held between two fingers and rested on the manhole cover.

No, the danger is not over yet!

Setsuna looked up.

Xiao Mu looked up at the sky and his expression changed.

A window fell down along with its frame.

The location where it fell happened to be where he and his child were.

Xiao Mu grabbed the child, stood up, and took a step back.

Still wrong, is there still danger?

Eye of Insight... Xiao Mu's eyes moved up and down crazily.

Then his eyes locked on the fallen window.

Double glazed windows, one inside and one outside.

Strange thing is.

There was a wad of toilet paper sandwiched between the window panes.

toilet paper?

Xiao Mu's eyelids twitched, he immediately stepped back and appeared in front of the unit door.

The moment he put the child down, he grabbed the door of the unit.

There was a bang.

Xiao Mu directly grabbed the unit door, like a shield.

The body moved again and appeared in front of the window that immediately hit the ground.

Lift the unit door.

Bang.

The window frame hit the ground.

At the same time, the unit door in Xiao Mu's hand was also slapped on the window.

boom!

A wad of toilet paper exploded in the window like a grenade exploding.

Xiao Mu's arms trembled in shock.

explode?

Xiao Mu sneered.

Suppose, he did not cover the unit door.

An explosion will inevitably break the glass.

Will the shattered glass shards fly everywhere like bullets?

At that time, even if they were not hit by the window, they avoided it.

He will also be hit by glass shards, and he will be seriously injured even if he doesn't die?

It's a good idea, don't think so next time... Xiao Mu sneered.

"Are you okay?"

Zhao Xiaotang and others rushed over, even with their guns drawn.

They were not blind, they all saw the explosion and were alert to their surroundings.

"Don't look anymore, he must have run away."

Xiao Mu looked at the sewage well in front of him and pointed, "Dangerous things are down there."

He had already smelled not only methane and other gases (biogas) in the sewage well, but also the smell of gasoline and gunpowder!

Zhao Xiaotang quickly opened the sewage manhole cover, his expression changed, and he also smelled the smell of gasoline.

He looked at the still burning cigarette on the ground, then at the sewage well, and finally at the child, his face turning livid.

Not only him, at this time, some of the police kings opened the unit door and looked at the shattered windows below.

"Potassium chlorate and... red phosphorus?"

A police king's face became strange, muttering, "Smash firecrackers?!"

The reason why I know this thing is that I have been involved in a case of illegal firecrackers and seized a batch of illegal smash firecrackers.

Smash firecrackers, also known as sand cannons, are small firecrackers that explode when thrown, and many people have played with them.

The ingredients of smash firecrackers generally contain potassium chlorate and red phosphorus.

Potassium chlorate is a strong oxidant, and phosphorus is a strong reducing agent.

And the sensitivity of these two substances is very high, and they will explode when they are hit or squeezed.

This means that the toilet paper ball in the double-layer glass of the window just now is a large smash firecracker.

Its purpose is to shatter the glass and injure people.

And the sewage well in front of us has also been checked.

The biogas is very heavy, and gasoline and gunpowder have been found.

If you throw a "open flame" such as a cigarette butt down, as long as any of them is ignited, there will be a terrible explosion.

Needless to say, what will happen to the people near the scene?

After thinking this through, everyone's faces became even uglier.

Xiao Mu's eyes were fixed on the trembling child.

He had guessed that someone had just come.

He used their time in the apartment to set up some traps.

Or maybe a trap had been set up long ago.

And the child in front of him was the key to triggering the trap, and also the bait?

If that's the case... eh?

Xiao Mu looked up and looked at another apartment building, and saw a pair of eyes.

His face was covered with a layer of ice, and he almost laughed out of anger.

No, who gave you the courage.

You didn't run away, and you dared to eat melons nearby?