When Han Cheng put the "Saint's Redemption" back on the bookshelf, he pretended to glance casually at the place on the top shelf that glowed with a faint red light.
I found that there was indeed a secret camera device hidden on the bookshelf.
Installing candid camera equipment in his own home, this abnormal behavior made Han Cheng feel that there was something wrong!
If Zhang Ya didn’t know that there was a secret camera device installed in her home.
In all likelihood, those candid camera equipments were used by Cao Qian to monitor Zhang Ya.
But now although Han Cheng has doubts about Cao Qian, he doesn't want to alert the enemy yet.
After all, he doesn't know much about Cao Qian's situation now.
And it has not yet been determined that Cao Qian is the murderer.
After putting the books back on the bookshelf, Han Cheng did not stay any longer and quickly left Zhang Ya's house with Hong Xi.
After returning to the car, Han Cheng frowned deeply and told Hong Xi, "Hong Xi, you immediately send a few plainclothes policemen to monitor Cao Qian 24 hours a day. If you find any abnormal behavior on his part, report it to me immediately! "
"Copy that!" Hong Xi nodded.
Seeing Han Cheng's expression, he knew that there must be a reason why Han Cheng asked him to do this. He didn't need to ask the reason and just did as he was told.
While Hong Xi led people to monitor Cao Qian, Han Cheng led people to investigate Cao Qian in detail from the outside.
After investigation, Han Cheng learned that Cao Qian was an engineer in the engineering department of a real estate company and often traveled to other places for inspections.
But what makes Han Cheng puzzling is that Han Cheng investigated from Cao Qian's company that although Cao Qian often traveled on business.
But the company only requires him to travel once or twice a month, and a business trip will not exceed three days at most!
But Cao Qian took the initiative to increase the number of business trips. At most, he even traveled seven or eight times a month, basically traveling the entire month.
Cao Qian's behavior was a bit abnormal, as if he was trying to escape from something by going on a business trip.
Han Cheng remembered that Zhang Ya had said that Cao Qian was not good at that, so he guessed that Cao Qian was trying to escape Zhang Ya, who was "like a wolf and a tiger".
Cao Qian and Zhang Ya have been married for many years, but they have never had children. Han Cheng guessed that this was most likely due to Cao Qian's health.
However, Cao Qian told his friends another story about not having children for many years.
He said that he and Zhang Ya couldn't have children because Zhang Ya had a physical problem. He didn't dislike his wife, so he planned to become a DINK.
In the eyes of outsiders, Cao Qian has always been a good man and a good husband.
It seems reasonable for a man like Cao Qian, who has such a good face, not to want to make things worse for outsiders to laugh at after knowing that his wife had cuckolded him.
But why would he put surveillance equipment in his home?
He knew his wife was cheating, why didn't he expose it?
In order to find out whether Zhang Ya knew that her home was equipped with secret camera equipment.
Han Cheng took advantage of Cao Qian's absence from Nanshi on a business trip and summoned Zhang Ya again.
Zhang Ya was shocked when she heard that there was a camera device installed in her home.
Obviously, she didn't know that Cao Qian had installed secret camera equipment at home.
She knew very well that if Cao Qian had installed candid camera equipment at home, that is to say, Cao Qian would have known about her date with Liao Bang at home.
But he pretended not to know anything.
It’s scary to think about it!
One can imagine how deep this man's city is!
"Zhang Ya, we now suspect that Cao Qian is the murderer who poisoned Liao Bang. Please carefully recall whether Cao Qian has done anything unusual in the recent period!"
In the interrogation room, Zhang Ya, who was still in shock, came to his senses and said, "I really didn't expect Cao Qian to be such a deep-seated person. Now that I think about living under the same roof with such a person, I feel a little uncomfortable on my back." Chilly!"
"Officer, you said he killed Liao Bang, will I be the next one to be killed? I'm so scared!"
Zhang Ya became more and more frightened.
"Zhang Ya, don't be afraid. Cao Qian is under our surveillance now. He can't hurt you!" Han Cheng comforted Zhang Ya.
"He can poison Liao Bang who is far away in Jiu Ming Mountain at home. There is nothing he can't do! No! I don't want to die! Officer, lock me up. I don't want to go back to that home again!"
Zhang Ya became more and more excited.
Han Cheng could only ask Yu Shan to come over and provide psychological counseling to Zhang Ya.
After Yu Shan's enlightenment, Zhang Ya's mood gradually calmed down.
She answered Han Cheng's question again, "As for Cao Qian's recent unusual behavior, it is that he has reduced the number of business trips and even took the initiative to do the laundry!"
"Has he ever bought a snake and raised it?"
"No!" Zhang Ya shook his head, "But I often see him watching short videos about snakes!"
At this moment, Zhang Ya's phone rang suddenly.
The phone showed that the call was from Cao Qian.
Zhang Ya's face changed drastically, and his hands kept shaking, "Police...Officer, should I answer or not?"
"Answer, put on speakerphone and calm down!" Han Cheng said.
Zhang Ya took a deep breath, answered the phone, and clicked on speakerphone.
"Honey, where are you?" Cao Qian asked on the other end of the phone.
"I'm at home!" Zhang Ya tried hard to keep his voice calm.
"Oh! Really?" Cao Qian's tone was slightly disappointed, "Let's have a video call later. I want to see Xiaolong!"
"Oh! What's so good about a lizard! I'm going out to buy something, so I won't tell you! I'm dead!"
Zhang Ya immediately hung up the phone after speaking.
"Officer, he seems to know that I'm not at home!" Zhang Ya looked nervous.
Han Cheng nodded, "From the tone of his words just now, it seems like he already knows that you are not at home!"
"Then he really installed a camera at home!" Zhang Ya looked horrified.
Not long after, Hong Xi called Han Cheng.
"Han Shen! Cao Qian has made a new move. He bought a plane ticket back to Nanshi!" Hong Xi said.
"Okay, I'll arrange for someone to follow up here!"
After hanging up the phone, Han Cheng fell into deep thought.
Cao Qian hurried back to Nanshi. What did he want to do?
The place where Cao Qian went on a business trip was not far from Nanshi. He returned to Nanshi in more than an hour.
The people sent by Han Cheng followed Cao Qian all the way.
I saw Cao Qian rushing home after getting off the plane.
But the strange thing is that after arriving home, Cao Qian did not rush to find Zhang Ya or call Zhang Ya.
After a while, the people sent by Han Cheng called and reported to Han Cheng that they saw Cao Qian burning something at home.
After hearing this, Han Cheng shouted, "No!" Cao Qian wants to destroy the evidence.
Han Cheng immediately asked the people he sent to break down the door and stop Cao Qian from burning things.
Fortunately, the people sent by Han Cheng broke into the door and stopped Cao Qian in time. He only burned half of the things!
What Cao Qian wanted to burn was the candid camera equipment he had hidden on the bookshelf.
Soon, Cao Qian was brought back to the Jiangnan Branch.
