There was a mobile phone charger in the hotel room, and when the trainee police officer under Du Chen carefully connected the mobile phone to the charger, Tang Cheng suddenly came over and said suspiciously, "Why is this mobile phone so clean?" ”

"Huh?" The trainee police officer was stunned for a moment, and then smiled, "It's not very dirty under the hotel bed. ”

"No, I'm not talking about dust, it's fingerprints." Tang Cheng said seriously, "The piano lacquered body will definitely leave a lot of fingerprints, but look at this mobile phone, it's too clean!" ”

The trainee constable suddenly said, "yes, it's too clean." If it was accidentally dropped, how could it be that there was not a single fingerprint? ”

Tang Cheng explained, "Therefore, there is only one possibility, that is, someone wiped all the fingerprints on the mobile phone, and then threw it under the bed through something." ”。

Continuing to work backwards along this line of thought: why did he wipe his fingerprints clean? The answer is that he must have touched the phone. Du Chen's voice came from behind, and he took his words and continued, "Strictly speaking, there are two situations: one is Tong Jiaojiao's clever trap and fraud against Zhao Xiaojun; The other was the work of her captors. As for why he took Tong Jiaojiao's mobile phone, it was because there was something in the mobile phone that could threaten him. ”

"The most straightforward way to know the true outcome of these two scenarios is to restart your phone and check the contents." Tang Cheng couldn't help but sigh, "Officer Du gave such a decision almost subconsciously just now, and his mind turned really fast. ”

"After working for a long time, the sense of logic has been automatically developed. However, to be able to interpret my train of thought so quickly, you kid is not simple. After Du Chen finished with a smile, he patted the back of the head of the stunned trainee police officer on the side, "Learn a little." ”

The trainee police officer rubbed his head and nodded, and handed the mobile phone that had been connected to the charging cable to Du Chen, "Team Du, turn it on." ”

Du Chen took the phone, took off his gloves, swiped his fingers on the screen a few times, and quickly switched between pages in front of his eyes, but the call records and text message records he saw were almost blank.

"All the communication records in the mobile phone have been emptied, and the social software has been uninstalled. If it was Tong Jiaojiao herself, she didn't have to do this. Du Chen frowned.

"How long does it take to recover the records?" Tang Cheng asked.

"Then you have to bring it back to the bureau first, and it will take half a day at the earliest."

"If people are really kidnapped, delaying it for so long will delay a lot of things."

"In this case, the only clue left is the information that Zhao Xiaojun received......"

As the two were talking, the police officer who had just been sent to check the surveillance hurriedly pushed the door in.

"Team Du!"

"Why did you come back so soon?" Du Chen was puzzled.

"Found it!" The police officer said, "I just met a security guard who said that he saw Tong Jiaojiao when he was on duty last night. Not only that, but there were some minor arguments between the two. The situation at that time was probably like this: Tong Jiaojiao went out in a hurry, and accidentally bumped into the security guard who was playing with her mobile phone with her head down, and broke the security guard's mobile phone. At that time, she was in a hurry to leave, so she left a number for the security guard and said that she would come back and compensate him. As a result, the security guard stared at the door for a night, but she was not seen, and no one answered the phone. He thought Tong Jiaojiao had run away, and when he saw me, he pulled me and complained. I watched the monitoring, Tong Jiaojiao left the hotel at 7:26 last night, and got into a Jetta taxi after going out. ”

"Left on your own?" Tang Cheng asked.

"Yes!" The officer nodded.

"That's not right, if she left on her own, what's going on with this phone?" Tang Cheng said seriously, "Officer Du's inference is very reasonable, if she wants to set up a bureau to cheat Zhao Xiaojun's money, there is no need to do anything on her mobile phone." And when she left her phone number for the security guard last night, she must have subconsciously thought about whether she had brought her mobile phone. Now that the mobile phone application is so developed, it is difficult to do things without installing a mobile phone when you go out, and if you forget it, you will inevitably come back to pick it up. But she didn't, which means that she was carrying the phone with her at the time. ”

"If I brought it with me at the time, then now that Tong Jiaojiao has not come back, how did the mobile phone come back?" Officer Xiao Zhang scratched his head.

"It was her captors who sent her back." Du Chen said firmly, "I took the room card and mobile phone, emptied the content related to him in the mobile phone, and then wiped off the fingerprints, pretending that Tong Jiaojiao accidentally dropped the mobile phone on the ground." The phone is still in the room, and others will think that she is just out of the door temporarily. After all, before Zhao Xiaojun called the police, he was the only one who received the news of the kidnapping, which was very targeted blackmail. ”

"Isn't it okay to directly locate the number that sent a message to Zhao Xiaojun?" Lin Yi, who was a little impatient, followed in.

"We wanted it to be that simple, but that number was a temporary card that was purchased through an improper channel. The location found by the technical team is also this Peninsula Hotel, otherwise we would not have come all the way here. Du Chen raised his eyebrows and said.

"What's the battery level of your phone?" Tang Cheng said suddenly.

Du Chen glanced down, "Thirty percent." Huh, thirty percent? ”

"That doesn't look like an automatic shutdown." Tang Cheng said, "We made more than 20 phone calls, and the last call was made at about 8 o'clock in the morning, just when we were told that the other party had turned off the phone. It means that around eight o'clock, the man is here. The phone kept ringing but didn't answer, and he would definitely be suspicious, so he turned off his phone. ”

"There's another possibility." Du Chen suddenly thought of something, and looked at Zhao Xiaojun, "Dial the number that sent you a text message." ”

Zhao Xiaojun did so, and two seconds later, the mobile phone in Du Chen's hand rang.

"This ......"

Sure enough, the guy put the card on this phone, and the text messages were sent from this phone. After sending, he deleted all the text messages and deleted the records of missed calls. Zhao Xiaojun received the text message at 8:05 in the morning, and the phone was turned off ......at about 8:03," Du Chen said, turning to another police officer, "Xiao Li, go to the monitoring room again and lock the suspect who appeared in front of the door of room 3008 between 7 and 8:30 in the morning." Physical characteristics should be preferably detailed! ”

"Yes!" Police officer Xiao Li ran out quickly.

Tang Cheng pulled Zhao Xiaojun over, "What did that blackmail message say?" 200,000? How do you transfer money to him? ”

"He only said that I should prepare the money, and the specific transaction location will be notified separately." Zhao Xiaojun whispered, "But I really don't have that much money...... Officer Du said that it was too passive to wait all the time, so it was better to find another way and bring me here. ”

"That's right, that's what I said." Du Chen nodded, "In this kind of saving people, we must try to grasp more initiative!" ”

Save...... Take more initiative.

Tang Cheng realized this sentence, and couldn't help but turn his head to glance at Lin Yi, and a light flashed in his eyes. Isn't he also here to save people now? The mastermind behind the scenes has been hiding in the shadows, without revealing a trace, in addition to relying on the assistance of Turing machines, how can he grasp more initiative?