Although the bomb has been defused, the police still do not dare to relax their vigilance, and the EOD Security Brigade of the Patrol Special Police Detachment of the Public Security Bureau sent police dogs, and the officers of the EOD Security Brigade held detectors in their hands to carefully inspect every corner of the room.

If the killer can plant one bomb, it is possible to plant a second.

The killer can use TN.T to make bombs, and he can use plastic explosives.

Plastic explosives are C4, which is made of a mixture of a variety of high-performance explosives, the main component is polyisobutylene, which can be crushed into powder, can be freely packed in rubber materials, and then extruded into any shape, and can even be wrapped in chewing gum and placed in a very hidden location.

Police officers from the EOD Security Brigade conducted a careful search of Qi Xuehui's house to ensure that no suspected explosives were found before evacuating the scene and handing it over to the criminal police team.

"Team Qin, how long did it take for you to leave Qi Xuehui's house for the first time and then return for the second time?" Officer Wang, the captain of the criminal police team, asked me carefully.

"About thirty minutes to forty minutes or so." I reminisced a little and replied earnestly.

This is the normal process of an interrogation process for an interrogator who is an eyewitness to a case.

However, this is the first time that I have been questioned by the criminal police as an eyewitness to the case.

It's a strange feeling, but it's also strange.

"Have you met any strange people along the way?" Officer Wang looked at me and asked seriously.

"Strange people......" I muttered, recalling in my mind all the things I had encountered on the road since I left Qi Xuehui's house for the first time.

"At that time, I walked into the elevator and then went to the first floor and I met a young man...... The young man ...... "I thought about it, and frowned suddenly.

"You said you met a young man?" Officer Wang asked me immediately.

I nodded, but I didn't continue.

I did meet a guy at the elevator on the first floor, but what does that mean? He didn't do anything weird, and I don't know what floor he went to.

Thinking of this, I suddenly said: "You can check the monitoring in the elevator." ”

"Well, the technical team has already gone to check." Officer Wang said in a deep voice, and then continued to ask me: "Team Qin, have you encountered anything else?" ”

I pondered for a moment and slowly shook my head: "There is nothing else, I drove away and drove back." ”

I paused, and added: "But these, after Qi Xuehui wakes up, everything will be clear, it's just ......"

"Just what?" Officer Wang hurriedly asked me.

"It's just...... The other party is running out of time for us. I said in a deep voice.

As a criminal policeman, Officer Wang immediately read some meaning from my words, and then he asked me a little nervously: "Team Qin, you mean that the murderer will commit the crime again?!" ”

I took a deep breath, nodded vigorously, and let out a weak voice: "Both bombing and arson cases have a common feature, that is, murderers like to commit serial crimes. ”

Officer Wang thought about it, instantly became nervous, and his heart couldn't help but tighten, he frowned and looked around the room, looked at the technical team that was now busy, and said in a deep voice: "It seems that we must find the murderer before the next bomb explodes." ”

It's really what we have to do right now, but I have a different view in my mind.

I looked at Officer Wang's serious face in a daze, and slowly asked, "Do you know why the murderer didn't kill Qi Xuehui?" ”

Hearing this question, Officer Wang was stunned, looked at me in a daze, and asked very puzzledly, "Why?" ”

"Because he's going to play games with us." I sneered and said slowly.

"Making games?" At this moment, Officer Wang was even more puzzled.

I opened my mouth and explained: "The murderer planted a bomb in Qi Xuehui's office seven years ago, but I don't know why, the bomb was not detonated, and seven years later, on a very coincidental day, a very coincidental thing happened, that is, Hu Lianyang made the wrong phone call and accidentally detonated the bomb.

But then, the murderer seven years ago appeared, so, where did the murderer go in the past seven years? We don't know about it, but what we do know is that the killer has more sophisticated bomb-making skills than he did seven years ago, and has made a more perfect bomb.

If he really wanted to kill Qi Xuehui, he could install a remote-controlled bomb, or adjust the timing of the bomb to ten minutes, or even less. These are enough to detonate the bomb when the murderer leaves the scene of the crime and is in absolutely safe environment.

Then the bomb exploded, Qi Xuehui died, the scene was destroyed, and the murderer could go unpunished. Therefore, the murderer's bomb was defused by the police. ”

After listening to my analysis, Officer Wang also agreed with my opinion, and nodded while thinking: "That's true. ”

After a while, a criminal policeman next to me walked up to me and said to me seriously, "Team Qin, we need to collect your fingerprints and footprints." ”

"There are records in the bureau, you can go back and check it." I said lightly.

"Oops, it's too troublesome to transfer the record in the bureau, and you also need permissions and passwords, so you can cooperate with the collection." Officer Wang took the fingerprint collection note from the criminal policeman's hand and handed it to me.

I shrugged my shoulders helplessly, left all the fingerprints of my ten fingers on the sticky notes, and cooperated with the collection of footprints.

After about twenty minutes, the technical team also closed.

They only collected footprints in Qi Xuehui's room, not the fingerprints of the murderer, who was most likely wearing gloves throughout the process.

No fingerprints were taken on the buttons in the elevator, but the surveillance footage in the surveillance has been copied.

Officer Wang nodded and beckoned: "Close." ”

On the way back to the station, Officer Wang and I sat in a car.

"We must protect Qi Xuehui's safety 24 hours a day, the murderer is likely to sneak into the hospital to commit crimes." I said lightly.

"Don't worry, I've arranged everything, there are three criminal policemen on duty to guard, Qi Xuehui has also been arranged to a separate ward, absolutely safe, as soon as she wakes up, I will notify you immediately." Officer Wang said seriously.

I nodded, shifted my body to a more comfortable sitting position, leaned back in my chair, and rested with my eyes closed.

"In addition, all public security organs in Ningzhou City have been issued a notice to assist in the investigation, so that the fire department, hospital, and patrol special police are on standby 24 hours a day. Strengthen the patrol and security work of bus stops, subway stations, shopping malls, parks, and government offices, where the murderer's next bomb will be placed, is still an unknown, we suffered losses seven years ago, seven years later, we must be vigilant, absolutely no more accidents. I closed my eyes and said in a deep voice.

"Don't worry, Team Qin, I'll arrange it when I go back." Officer Wang made a reassuring voice.

I sat back comfortably in my chair, my mind racing.

There are not many people who can make bombs, where did the murderer learn this craft?

What happened in the seven years since the murderer disappeared?

The murderer wanted to kill Qi Xuehui seven years ago, but today, he didn't do it, why?

And the boy I met at the elevator entrance......