Teacher Chang is an easy-going, humble and polite person, and he always shows a kind and kind appearance on weekdays, but he doesn't like outsiders to take his things without permission, even Gu Song is no exception.

Xiao Yun has been by Teacher Chang's side for several years, and of course she knows Teacher Chang's temper. The reason why she made a suggestion to let Gu Song enter the storage room was that she didn't expect Teacher Chang to suddenly return to the clinic after work, and second, because she wanted to assist the police in finding her brother's murderer.

The atmosphere was stalemate for a moment, and Xiao Yun looked at Teacher Chang a little overwhelmed and said, "I'm sorry, teacher, we ......"

"Don't blame Xiao Yun." Gu Song hurriedly explained, "I was curious for a while, I wanted to see my previous archives, and Xiao Yun was also ground by me to help me open the door." ”

"You came to the clinic so late just to see those files?" Teacher Chang pushed down the frame of his glasses and asked suspiciously.

"Oh, that's not it." Gu Song smiled and put his arm around Xiao Yun's shoulders and made a lover-like intimate move. "I'm here to pick up Xiao Yun from work. I'll tell you the truth, we've been fine for a while. ”

Hearing Gu Song say this, Teacher Chang couldn't help but glance at Xiao Yun in surprise, and a complicated expression flashed on his face.

Xiao Yun showed a happy smile very cooperatively, and changed the topic: "Teacher, why are you back?" Did you forget something? ”

"yes, I forgot to bring my phone, and I didn't remember until the car was halfway there." Teacher Chang pretended to smile calmly, but the eyes behind the lenses lost their former kindness and were replaced by uneasiness and worry.

Seeing that Teacher Chang had no intention of leaving immediately, Gu Song was embarrassed to continue the investigation in front of the "suspect". He pretended to say goodbye to Teacher Chang casually, and took Xiao Yun's hand and walked out of the psychological clinic.

As soon as he came outside, Gu Song's eyebrows were tightly twisted together. Teacher Chang's every move is suspicious, and it is no coincidence that he didn't even get it right when he returned to the clinic halfway. Gu Song's suspicion of Teacher Chang became deeper and deeper, and at the same time, his mood became heavier and sadder......

In the clinic, Mr. Chang slowly walked to the bookshelf and took out a voice recorder from behind a hidden book. He fast-forwarded and played backwards from the moment he left the clinic. When the progress reached more than twenty minutes, Gu Song and Xiao Yun's voices came out clearly from inside, "What are the things in that storage room?" ”

Teacher Chang was shocked and continued to play backwards, when he heard the sentence, "Xiao Yun, think about it, did Teacher Chang ask you to clean the storage room before or after the 17th?" "I felt dizzy.

Despite spending 45 days uneventful with organ traffickers and casino thugs as shields, his worst fears happened. What he didn't want was for Gu Song to meddle in this case, but now he was afraid of something.

He turned off the recording and leaned back against the bookshelf, calming his nerves a little. He comforted himself that the other party was only in the suspicion stage now, and there was no evidence in his hands. As long as he behaves as usual and deals with Gu Song like a person in Branch F, this matter will be turned over sooner or later.

In a month and a half, he had already cleaned up all the traces related to Yu Jianan, and the things that should be disposed of had also been disposed of, even if Gu Song now brought a group of investigators to the clinic to look for evidence, I believe they would not be able to find any flaws from here. The only thing to worry about is the car he used to dump the body, as long as the police can't find that clue, this case will never be solved.

However, Teacher Chang's idea seems to be too optimistic, because in addition to Gu Song, there is also a powerful character who is helping to investigate this case.

Just a few minutes ago, Xia Shi just checked Mr. Chang's car rental records from Xingtu Car Rental Company, which happened to be from May 17 to May 18, 2016, which coincided with the date of Yu Jianan's murder. With this clue, Mr. Chang's suspicion of committing the crime instantly increased by several levels.

Xia Shi told Gu Song about this major discovery as soon as possible, and contacted Liu Yang, asking him to arrange technicians to conduct a comprehensive and detailed investigation of the suspected corpse dumping vehicle as soon as possible.

Half an hour later, the three people met at Xingtu Car Rental Company. While the technicians were conducting the survey work, Gu Song couldn't wait to ask Xia Shi, "How did you find this car?" ”

"That's right." Liu Yang also expressed doubts, "I have also carefully watched the surveillance video near the scene of the body dumping before, why didn't I notice that there was a problem with this car." ”

"Because the murderer is very cunning, he used a very simple trick to deceive you." Xia Shi took out a few photos from his pocket with a cigarette in his mouth and handed them to Gu Song and Liu Yang respectively. This is a photo of Mr. Chang driving the vehicle in disguise, and his real identity can be identified after enlarging the photo. The car appeared at around 10 p.m. on May 17 on a section of road near the site of the dumping of the body in the eastern suburbs of R City, but returned to the city at around 9 a.m. the next morning. You think that the murderer should return after dumping the body in a short time, so you ignore the car with a round-trip interval of 11 hours. ”

"Why haven't you been deceived?" Liu Yang asked unwillingly, and at the same time felt ashamed of his negligence.

"Because I not only saw the surveillance video near the scene of the dumping of the body, but also watched other videos, and found that the black Volkswagen with the same license plate number also appeared in the Yajun community, that is, near Mr. Chang's house, so I paid special attention to its whereabouts. Since your investigation results show that Mr. Chang drove his white Volvo car home from work on the night of May 17 and did not touch the car until the next day, it is very likely that he borrowed or rented a car. ”

"No......" Liu Yang snorted, and had to admire the efficiency of Xia Shi. You're still amazing, it only took a few hours to process so much video information. ”

"Maybe it's my luck." Xia Shi said with a smile, and then winked at Gu Song, who immediately understood how Xia Shi found this suspicious car in a short period of time.

Although the case has been deadlocked for more than a month, and now there is finally a breakthrough, Gu Song is not happy at all.

For him, Mr. Chang is a benefactor and a friend. When he suffered a heavy psychological blow and lost his identity, Mr. Chang gave him a lot of help and allowed him to return to his normal work and life. After he lost control of his hypnosis and stabbed Teacher Chang with a knife, Teacher Chang not only did not hold him responsible, but also interceded for him to avoid punishment.

If Teacher Chang is really the murderer of Yu Jianan, the only thing he can do is to persuade Teacher Chang to turn himself in and help the teacher win a chance for leniency.

The next morning, Gu Song came to Muyang Psychological Clinic again. Liu Yang's car was waiting outside, but Gu Song hoped that Liu Yang would give him a little time.

A familiar office, a familiar environment, a familiar two people sitting opposite each other. They are both smart people, and they already understand each other's inner thoughts when they see each other's eyes.

If only it were just an ordinary psychological session. He can also open his heart and pour out the pain he doesn't want to tell his family and friends; I can also talk to the teacher about those perverted serial killers, and learn psychoanalysis by the way; I can also smile and say to the teacher, "I think my illness has been cured, and it's okay to go out without taking medicine, right?" ”

It's a pity that things have developed so far, and there is no going back. No matter how unbearable his heart was, he had to fulfill his duty.

"Teacher, I really don't believe you're going to kill someone. Can you tell me why? After a moment of silence, Gu Song asked with great difficulty.

Teacher Chang looked at him with a complicated expression and did not answer.

Gu Song continued: "We have found the car you rented before, and found Yu Jianan's hair in the trunk of that car. I just want to know now, why did you kill Yu Jianan? Why deceive Xiao Yun? Do you know how much Xiao Yun respects you and trusts you, but why would you hurt her? ”

"Gu Song, I never wanted to hurt Xiao Yun, please believe me no matter what." Teacher Chang let out a sigh, and the voice was full of too much pain and helplessness. "You know, my own daughter went to the United States to study before she was 18 years old, and she was not with me all the time. Xiao Yun is only three years older than my daughter, sensible, obedient, and lovable. For the past few years, I have always treated Xiao Yun as my daughter. I know that her family conditions are not good, and it is not easy to start working and studying at a young age to support her family.

"Xiao Yun interned with me when she was a senior in college, and I learned about her situation and lent her a sum of money to help her pay for her brother's tuition, but I didn't expect her to return the money to me. At first, I didn't know that her brother was such a trouble-prone boy, until I heard Xiao Yun cry to me that her brother had squandered all his tuition fees and used them to play online games, and I felt angry and worthless for Xiao Yun.

"She is obviously so sensible and works so hard, but she is always held back by that uncompetitive brother. While girls of the same age are enjoying youth and enjoying life, she is burdened with debts, and she only hopes that her younger brother can repent as soon as possible, so that she can also breathe a sigh of relief, talk about love like other girls, and have a dream of youth......"

"Even so, you can't kill a 21-year-old boy. Even if he messes around and causes trouble to Xiao Yun again, he is Xiao Yun's own brother, and if he dies, Xiao Yun will definitely be sad and sad, haven't you thought about this? ”

"No, no, I didn't mean to kill him." Teacher Chang shook his head in pain, and an expression of horror and remorse gradually appeared on his face......