The coldness of the autumn rain could not extinguish the heat in Song Chuan's heart, and Song Chuan, who returned to his dormitory, was still beating faster, and his mind was full of Qin Feifei's charm and the beautiful appearance of soy milk hanging from the corner of her mouth...... Sin!

Song Chuan shook his head fiercely, forcing himself to calm down.

After the murder case on Binhe Road was solved in the afternoon, the system changed a little, but Song Chuan didn't bother to look carefully, and shifted his attention to the translucent system panel under his eyes, and Song Chuan found the biggest change at first glance.

The number behind the crime solving point in the upper right corner is no longer zero, but has become a hundred again.

"The reward points for solving the Binhe Road homicide case are the same as the points rewarded for Song Chuan's capture of the wanted criminal Wang Qiaoshan, which is one hundred."

This morning, when Song Chuan activated the Super Criminal Police Experience Card, he really felt that he was the god of criminal investigation, and the feeling that all the traces of the scene were displayed in front of him in the form of data and then came to a conclusion was really wonderful.

It's just that the effect of the Super Criminal Police Experience Card disappeared after Song Chuan caught Duan Hu, and now the price has also risen to two hundred points to solve the case.

Don't think about the experience card for the time being, Song Chuan focused his energy on the criminal investigation skill improvement card, Song Chuan has already felt the magic of the primary combat skill improvement card, and his combat effectiveness has been greatly improved.

Song Chuan is now aiming at the primary field investigation skill improvement card, at the scene of the crime, the most important thing is to find the clues brought by trivial details, Song Chuan has just graduated, and there is little urgent need to improve this ability at the scene.

"System, exchange for the primary field survey skill improvement card!"

"After deducting fifty solving points and completing the exchange, does the host load the system card?"

"Load Now!"

Rumble! The streamer flashed, and the cards floating in front of Song Chuan were shattered into points of light and sent to Song Chuan's mind, and countless knowledge and skills related to on-site investigation seemed to be imprinted in the depths of his consciousness.

"Complete the loading of the primary on-site investigation skill improvement card, and improve the host's on-site investigation ability to the level of senior criminal police."

A beginner card can be promoted to the level of a senior criminal policeman, which is cost-effective!

Buzz.

Song Chuan, who was immersed in the pleasure of the system, was summoned back to reality by the sound of the mobile phone vibrating, could it be that Lao Sky couldn't sleep and wanted to let himself tell ghost stories?

Well? Wang tao?

It was not Qin Feifei's phone, but her top boss Wang Tao.

Song Chuan looked at the time and was a little strange, it was so late, how could Team Wang call him?

Got on the phone: "Now to the detachment?" ”

Wang Tao's tone was a little urgent: "It's about that letter, Team Chen asked me to call you over." ”

The letter?

Song Chuan naturally knew about the fact that the criminal investigation detachment received a threatening letter, not only did he know that it was Song Chuan who went with Sun Baoqiang when he went to Huanghe Road to investigate and monitor three days ago.

"Okay team, I'll be there soon!"

The continuous drizzle outside the window cut off Song Chuan's thinking, wrapped in a raincoat, and Song Chuan went straight to the office building of the criminal investigation detachment.

In the No. 1 conference room, Chen Jianbin rubbed his temples vigorously with both hands, trying to make his somewhat stiff brain run at a high speed again, and the door of the conference room was pushed open, it was really Song Chuan.

A hint of joy flashed on Chen Jianbin 's face, the corners of his tired eyes opened, and several bloodshots were clearly visible: "Xiao Song is here, come on, sit." ”

"Team Chen is good."

Song Chuan greeted Chen Jianbin first, took off his raincoat and looked at several other people in Chen Jianbin Conference Room, three men and one woman.

Wang Tao, captain of the reconnaissance team.

Xia Dong, Director of Technical Office.

The other two are Sun Baoqiang and Zhang Lijun, both of whom are the backbone of the reconnaissance team.

Everyone sat down, and Chen Jianbin continued to preside over the meeting: "Xiao Song, you know the letter that the detachment received three days ago, right?" ”

Song Chuan knew that Chen Jianbin asked him to participate in the analysis of this case, and it should be that his performance in solving the Binhe Road murder case was affirmed by Chen Jianbin today, but about the case of the letter, he only knew about it, and he was only responsible for inquiring about the monitoring of the Yellow River Road at that time, and the other processes were not very clear, and he had never even seen the letter.

"Team Chen, I only participated in the investigation of the surveillance video of the Yellow River Road, and I don't know much about other details."

Chen Jianbin nodded, about this letter Chen Jianbin naturally could not be made public in the detachment on a large scale: "In this way, Wang Tao told Xiao Song in detail about the whole thing. ”

"Xiao Song, according to Wang Tao's narration, talk about your thoughts later!"

Wang Tao nodded and began to introduce in detail.

Wang Tao's introduction was very detailed, starting with the man on crutches handing over the letter to the little boy, and ending with them checking all the surveillance near Huanghe Road.

"Now, the taxi driver Zhao Guangming is in the No. 1 inquiry room next door to our conference room, just now Baoqiang has been in contact with the other party, and there is no special situation to find."

The rain outside the window is getting heavier and heavier, and the crackling sound on the window edge makes everyone's attention highly focused, Song Chuan did not activate the super criminal police experience card, this is just a threatening letter, and there are no other actual clues, Song Chuan's analysis now is to rely on the memory of the previous life he has just fused as a psychology expert, and then make a psychological profile for the sender.

"Can I see the original letter?"

Chen Jianbin nodded, and operated his mobile phone to forward the text message sent by the other party to Song Chuan: "This is the text message I received from the other party this afternoon, Fei Fei has already contacted the Information Bureau, this is the relevant technical information." ”

Xia Dong gathered the broken hair around his ears, and his embroidered eyebrows wrinkled slightly: "The other party's text message is sent through the base station upstairs of the criminal investigation detachment, using an anonymous phone card, and it is impossible to trace the information of the phone card at present, but it is certain that the other party was near the criminal investigation detachment when he sent the text message, within eight hundred meters to be exact." ”

On the computer screen is a map, centered on the criminal investigation detachment, surrounded by buildings within a circle of 800 meters.

Although Song Chuan didn't know how Ouyang Xiadong determined the other party's position, this was not his specialty, but he couldn't be wrong when he thought about it.

Turn on the phone, Song Chuan read the content of the text message word by word.

Winning...... RAGUEL……

Xia Dong handed over the original letter to Song Chuan at the same time, and gave the other party a pair of gloves by the way: "We have made a detailed analysis of the letter, envelope and printing ink, the envelope can basically be bought in any supermarket in the city, and the stationery is also the most common seventy grams of standard printing paper, which can be found in any copy shop, and the printer used by the other party should be HP1002 model, using the original imported ink cartridge." ”

"The envelope and the paper are not specific, there are no fingerprints on the letterhead, and the twelve fingerprints we extracted on the envelope correspond exactly to the postman, the boy who surrendered the letter, the sorter, etc., and there are no fingerprints of the man on crutches."

Song Chuan listened carefully to the results of Xia Dong's technical appraisal, while putting on gloves and carefully taking out the letter paper and reading the contents carefully.

After a while, Song Chuan put the letter paper and mobile phone side by side in front of him, took the pen and paper on the conference table and began to record some information.

Although Song Chuan at this moment does not have the blessing of the super criminal police experience card, the feeling of solving the case in the afternoon is still there, his thinking is very clear, and his grades in the Public Security University are very good, especially in criminal psychology, which makes Song Chuan quickly enter a state of high concentration.

All the details told by Wang Tao and Xia Dong, combined with the information on the letterhead and text messages, all converged in Song Chuan's mind, like the entangled raindrops outside the window pulling out a thick rain curtain, and the characteristics of the sender slowly converged in Song Chuan's mind.

Gradually, the outline of a cleanse became clearer and clearer in my mind.