In the interrogation room.
Cao Qian, who was wearing gold-rimmed glasses, looked calm and calm. He was not afraid at all when facing Han Cheng and Hong Xi, who were sitting opposite him and looked majestic.
It seemed that the police were expected to do nothing to him.
"Officer, what do you mean? Why are you trying me as a prisoner? I want to ask you, which law did I break?"
Cao Qian's words were full of provocation.
"You know what you have done!" Hong Xi shouted loudly.
"Officer, I don't know, please explain more clearly!" Cao Qian smiled lightly.
"Cao Qian, let me ask you, why did you burn those devices? Is there any ulterior secret hidden in them?"
"There's no secret! I just burned the things I didn't want. Is it illegal?" Cao Qian had a tyrannical attitude.
"You put a secret camera device in your home, who are you trying to secretly record?"
"What I put in my house is not your police's responsibility. I want to see if there are any intruders in my house, right?"
"I think you don't want to see if there is a thief in the house, but you want to see if your wife has stolen a man!" Hong Xi snorted coldly.
After hearing this, Cao Qian suddenly turned pale.
Then he returned to normal, "You policemen like to arrest people randomly. There are so many bad people in this world and you don't arrest them, but you arrest good citizens like me one by one for interrogation. It's really inexplicable!"
"If I broke any law, you name the crime and provide evidence! I will definitely admit that I did it!"
Cao Qian seemed to have expected that Han Cheng and the others would have nothing to do with him.
Seeing that Cao Qian looked like a dead pig that was not afraid of boiling water, Han Cheng chose to suspend the interrogation.
Now they have no evidence that Cao Qian killed someone.
Cao Qian's detention cannot exceed 48 hours at most.
Therefore, Han Cheng and the others had to find strong evidence in less than 48 hours.
Otherwise, Cao Qian would have to be released.
Half of the candid camera equipment was burned by Cao Qian, and the technical department is urgently repairing it. It is not yet known what was filmed inside.
Through the interrogation just now, Han Cheng had already learned about Cao Qian's character, which was as smelly and hard as a stone in a cesspool.
Han Cheng knew very well that if he couldn't find evidence, Cao Qian would not take the initiative to explain.
But where to start? This put Han Cheng in trouble.
After thinking for a moment, Han Cheng decided to investigate the source of the poison first.
If the snake venom was put in by Cao Qian, then there is probably some remaining snake venom hidden in his house.
Thinking of this, Han Cheng immediately led people to Cao Qian's home again to search.
But Han Cheng and the others searched Cao Qian's home carefully, but found no snake venom.
Could it be that Cao Qian had already destroyed the snake venom?
This seems very likely now!
Unable to find the snake venom, Han Cheng could only turn to find out where Cao Qian got the snake venom.
Han Chengcheng wanted to check Cao Qian's driving recorder and see where he had been recently.
Unexpectedly, Cao Qian had already prepared a backup plan and hid the memory card of the driving recorder.
"Damn it! This Cao Qian is so cunning! Every step seems to have been planned by him!" Hong Xi yelled.
Although Han Cheng also felt very angry, the more he needed to stay calm at this time.
It is less than 24 hours since Cao Qian was released.
He must obtain strong evidence within these 24 hours before he can continue to deal with Cao Qian.
"Hong Xi, have you checked whether Cao Qian's car was purchased in full or with a loan?" Han Cheng suddenly thought of something and asked Hong Xi.
"I checked, it was purchased with a loan, and he hasn't paid off the loan yet!"
"Great! Let's go!" Han Cheng smiled.
"Where to go?"
"Go to the loan company!"
.......
Generally speaking, when a car is bought with a loan, the loan company will install positioning equipment in the car, and they will not remove the positioning equipment until the car owner has paid off the loan.
Through positioning equipment, people from the loan company can check the historical driving trajectory of the car.
Han Cheng's purpose in going to the loan company was to get them to find out the recent driving trajectory of Cao Qian's car.
After checking the car's driving trajectory, Han Cheng discovered that Cao Qian's car had visited a snake breeding base in the suburbs of Nanshi ten days ago.
Snake breeding base! Snake venom!
Combining the two, Han Cheng immediately thought whether the snake venom Cao Qian cast was bought from the snake breeding base!
So, Han Cheng immediately drove to the snake breeding base.
When Han Cheng showed Cao Qian's photo to the owner of the snake breeding base, he immediately recognized Cao Qian.
"Boss, what kind of snake did he buy from you?" Han Cheng asked.
"He is quite strange. When he came up, he asked me which kind of snake is the most venomous here. I asked him why he wanted venomous snakes. He said he wanted to raise them. He said he usually likes to raise cold-blooded animals!"
"I thought he looked like someone who had raised cold-blooded animals, so I introduced him to the most venomous cobra we raise here! Comrade police, this is this kind of snake!"
The snake owner said while pointing to a cobra in a glass case.
Han Cheng took out his mobile phone and took a few photos of the cobra.
At this time, the police from the technical department called Han Cheng and told him that all the videos in the candid camera equipment had been restored!
It's really good news one after another.
Han Cheng immediately rushed back to the bureau.
The technician copied all the videos restored from the candid camera equipment to a USB flash drive and handed them to Han Cheng.
It stores a month's worth of videos captured by candid camera equipment.
In other words, at least a month ago, Cao Qian had begun to suspect Zhang Ya of stealing men at home and hiding the secret camera equipment at home.
After Han Cheng used the double-speed viewing skill to watch all the videos.
He finally understood how Cao Qian poisoned Liao Bang from the air!
In the interrogation room.
Cao Qian was interrogated again.
"Cao Qian, let me tell you two pieces of good news. One is that we have found out where you bought the viper, and the other is that we have restored all the videos in the candid camera."
Han Cheng didn't talk nonsense and went straight to the point.
After hearing this, Cao Qian's expression changed with shock. He did not expect that Han Cheng would find evidence of his crime so quickly.
"Can you see if the venomous snake you bought is this kind?"
Han Cheng opened a photo of venomous snakes he took at the snake breeding base and showed it to Cao Qian.
"Are you saying it yourself? Do you want me to say it for you?"
"Officer, I want to know, what did you find in those videos?"
Cao Qian didn't seem to believe that Han Cheng could find any evidence from the video in such a short period of time, so he looked at Han Cheng calmly.
"Cao Qian, it seems you still underestimate the ability of our police to handle cases!"
"Okay, then I will restore it to you one by one, how you poisoned Liao Bang from the air!"
Han Cheng smiled slightly, stood up from his seat, and walked towards Cao Qian and said.
"After you learned that Zhang Ya was stealing a man at home, you decided to use snake venom to kill the adulterer Liao Bang, so you went to the snake breeding base in the suburbs and bought a venomous snake."
