Chen Shifu explained: "Lao Ding is our driver. He usually lives at our house. In addition to his work as a driver, he is also responsible for managing the monitoring room of our house. He is on duty in the monitoring room every night."
Soon, someone immediately went out to find Old Ding. At this moment, Old Ding's hands were covered with grease and he was holding a wrench.
After coming over, Lao Ding was stunned when he saw so many people at the scene and asked: "Mr. Chen, what do you want from me?"
Chen Shifu asked: "Old Ding, what are you doing? Why don't I see you on duty here tonight?"
Lao Ding said: "Mr. Chen, I was originally on duty here tonight, but an hour ago, I suddenly remembered that there was always a strange noise in the engine of a Japanese car at home, so I left the duty room and went to the underground garage.
Perform repairs on that Japanese car."
Li Tianyi suddenly asked: "Not long ago, there was a power outage for about five minutes. Don't you know? If there is a power outage, can you still repair the car?"
Lao Ding smiled and said: "Officer, you may not know that there is an emergency lighting power supply in the underground garage of our house. I knew it when there was a power outage before. At that time, I estimated that the power outage would not last long, because we
This villa has a two-line power supply. If one of the lines has a power outage, the other line will also provide power. So I waited in the garage for a while. Unexpectedly, I waited for a long time before the call came. After the call, I called again.
Let’s continue repairing the car.”
Li Tianyi noticed that when this old man was speaking, his eyes flickered and he looked around with a sly look, and suddenly asked: "How is the repair of your car?"
Lao Ding said quickly: "I have found the problem with the engine. This Japanese car has the same problem as the Touareg. The reason why there is abnormal sound in the engine is because of a design problem. Although it is also a luxury car worth more than one million yuan, the Japanese car has the same problem as the Touareg.
The cars sold to us Chinese people are all of the worst quality. These little Japanese are really abominable."
At this time, Chen Shifu looked at Lao Ding and asked: "Old Ding, what is going on with this hard disk video recorder? Why can't the video recordings during the power outage be found on the hard disk video recorder?"
Lao Ding said quickly: "This is impossible. This hard disk video recorder has always been running normally."
After Li Tianyi stared at Lao Ding for a few times, he didn't say anything. Instead, he directly turned on the hard disk video recorder in front of Lao Ding and once again showed the surveillance content recorded on the hard disk video recorder. From the above, it can be clearly seen that,
The hard disk video recorder will not record content for several minutes between power outages.
Lao Ding stared at the hard disk video recorder for a long time, and finally said with a wry smile: "I don't understand this. I think it's better to ask professional monitoring engineers to come and take a look. They must know what's going on."
Li Tianyi stared at Lao Ding's eyes for a while, then wandered around the monitoring room, slowly came to the place where the UPS power supply was located in the monitoring room, and checked along the power supply line of the UPS power supply.
Finally, Li Tianyi discovered the problem and pulled out a power cord connected to the ups battery pack with a gentle pull.
Li Tianyi said coldly: "The problem has been found. The reason why there was no video recording during the power outage is because the UPS power supply system, which is responsible for powering the hard disk video recorder and all cameras during the power outage, has a problem with the UPS battery pack.
The connected power cord is in a virtual connection state, which is equivalent to the UPS power supply having no current and voltage output. After a power outage, it is naturally unable to supply power to hard disk video recorders, cameras, storage and other equipment."
Speaking of this, Li Tianyi looked at Old Ding coldly and asked: "Old Ding, are you always in charge of this monitoring room?"
Lao Ding nodded and said, "Yes. I have always been in charge."
Li Tianyi asked: "In that case, why didn't you find out about such an important issue of UPS power supply?"
Old Ding smiled bitterly and said: "Officer, I'm just a driver. As for the monitoring room, I'm just on duty to see if anyone sneaks into the house to steal anything. As for the maintenance and repair of these monitoring equipment, I don't know much about it.
I don’t even understand.”
With an understatement, Lao Ding shirked all the responsibilities on himself.
Li Tianyi looked at Chen Shifu and asked, "Is he right?"
Chen Shifu nodded and said: "That's true. Usually he is just a guest security guard. Because our community has security guards patrolling 24 hours a day, there is no problem with the security of the community. We installed surveillance just in case.
So Lao Ding is usually only responsible for night duty. To put it bluntly, he just sleeps in the duty room at night.
All surveillance cameras are equipped with motion detection function. If someone sneaks into our villa, the motion detection function will identify it and call the police."
Li Tianyi looked at Old Ding and asked: "Old Ding, when you usually sleep here, does the alarm sound?"
Lao Ding nodded and said: "Sometimes there are, but rarely, but every time the alarm sounds, I will get up and take a look, because at this time, the video playback and real-time recording of when the alarm sounds will automatically pop up on the monitoring screen
.
But usually at this time it is often caused by stray cats in the community."
Li Tianyi nodded slightly. Lao Ding was not lying. He just checked the alarm content displayed on the hard disk video recorder. It was indeed true that sometimes it was caused by stray cats.
Li Tianyi looked at Chen Shifu and Zhang Yanru and said, "Please, you two, call all the people in the villa over."
Soon, everyone in the villa was called over. In addition to Chen Shifu, Zhang Yanru and Zhang Yanru's son, there were also lawyer Chen Keli, female nanny Jiao Meiling, and driver Ding Qingqing.
After all these people arrived, Li Tianyi looked at everyone and said: "Everyone, I believe you should know by now that your boss Chen Tianguo is dead. From the looks of it, he was strangled to death with a rope.
Next, our Municipal Public Security Bureau will discuss the case on site, and you, no matter who has any clues, can interrupt our case discussion at any time, provide us with clues, and express your own opinions on the content of our discussion. Our
There is only one goal, to find the criminal suspect as soon as possible and keep everyone safe so as not to become the next target of the criminal suspect. Do you hear me clearly?"
These people all nodded, and Li Tianyi glanced over their faces one by one, recording the expressions of each of them at this moment.
Then, Li Tianyi looked at Jin Defu and Xia Mingze and asked, "Boy, what do you think of this murder tonight?"
Jin Defu pondered for a moment and said: "Director Li, I think the suspect is definitely not a migrant worker. Because for migrant workers, their main purpose today is not to seek revenge, but to get their arrears of wages and
Engineering funds. Killing Chen Tianguo will not do them any good.
And during the previous investigation, I found no trace of anyone jumping from the building under the window."
Just as Jin Defu finished speaking, Zhang Yanru stood up and said: "I don't agree with this view, because if the migrant worker who committed the crime could have jumped from the window after killing my husband, he would only need a few people under the window.
Just work together to catch him."
Jin Defu said with a smile: "How to catch him? After all, he is a big man. He weighs more than 20 kilograms no matter what. Jumping directly from the third floor more than ten meters high, that kind of impact is not something ordinary people can handle.
Live."
Zhang Yanru said: "They can't catch it with their hands, but they can use tools."
For example, bags, nets and the like. Migrant workers working on construction sites are most in need of these things.
When Li Tianyi heard what Zhang Yanru said, he immediately waved to a policeman and said, "Take a few people out immediately and start a fan-shaped search to the north from where Chen Tianguo's study is, about 300 meters deep."
The policeman walked out quickly. More than ten minutes later, he came back with his men and said, "Director Li, we have searched and found no suspicious items."
Li Tianyi nodded, looked at Zhang Yanru and said, "You heard it, right? This doubt can be eliminated."
Zhang Yanru added: "Then, how can we explain the rubber shoe prints of migrant workers and the rope with mud spots found at the scene?"
Li Tianyi smiled slightly and said: "This is very simple. You just need to get a police dog to sniff the rope and the squint, and then let the police dog search according to the picture."
When Li Tianyi was talking, his eyes kept scanning the faces of the Chen family members present.
Li Tianyi noticed that when he mentioned police dogs, lawyer Chen Keli's expression changed significantly.
Seeing this, Li Tianyi felt confident.
After Li Tianyi finished speaking, not long after, a policeman came in with a police dog. After saluting Li Tianyi, he said: "Director Li, Shi Yunxiao of the police dog team is reporting to you."
Li Tianyi nodded and said: "Hello, Comrade Shi Yunxiao, please take your police dog to sniff out the smell of the rope and rubber shoe prints, and let it search to see if there is anyone at the scene who matches the smell.
."
As soon as Li Tianyi finished speaking, lawyer Chen Keli stood up immediately and said, "Director Li, I think you should let the police dogs go over the migrant workers first. After all, they are the most suspicious people."
Li Tianyi said calmly: "Thank you Mr. Chen Keli for your suggestion, but we cannot adopt it because our police have our own procedures and principles for handling cases. For our police, without identifying the murderer, anyone can
He is the murderer. So for us, whether they are migrant workers or all of you here, they are all potential candidates for criminal suspects."
After speaking, Li Tianyi waved his hand, and Shi Yunxiao immediately took the police dog to the rope and rubber shoe footprints to sniff. Then, under the guidance of Shi Yunxiao, the police dog sniffed through the bodies of several people present.
Finally, he stopped and lay down next to Chen Keli.
Seeing this, Chen Keli's face immediately turned pale. Li Tianyi, Jin Defu and Xia Mingze immediately showed excited smiles on their faces.