"In that case, Dr. Song, could you please provide the consultation records from this period?"

“This…” Song Mu hesitated, resting his chin on his hand. “Officer Wang, as you know, the ethical bottom line for psychologists is to keep the secrets of their clients. Your request is really putting me in a difficult position.”

"Regarding this, Dr. Song, you can rest assured. I can guarantee that the patient's information will never be known to a third person other than me." Wang Shen looked at Song Mu, his tone not implying any further request.

"Alright then." Song Mu nodded helplessly, stood up from the chair, and walked towards the door.

"Xu Wen, bring me the visitor log." Song Mu pushed open the office door and instructed his secretary. A moment later, the secretary handed Song Mu a notebook. Song Mu took the notebook at the office door and closed it.

"This is our visitor log. Every visitor, whether a patient or not, is recorded in detail. It includes the time of visit, the reason for the visit, and the time of departure," Song Mu explained to Wang Shen, holding the notebook in his hand. However, Song Mu didn't hand the notebook to Wang Shen; instead, he turned and walked towards the photocopier in the corner. Song Mu skillfully operated the photocopier. The photocopier started running, emitting a series of slight vibrations.

A few minutes later, Song Mu took the photocopied papers out of the copier and walked over to Wang Shen. "These are it, a month's worth of visitor records." Song Mu handed the records to Wang Shen. "I'm so sorry, I still have to protect the privacy of the visitors, so I only photocopied nearly a month's worth of records. These records should be more than enough for you to track down the thief who stole the diary."

Wang Shen looked at the thick stack of papers in his hand, nodded and smiled at Song Mu. "Dr. Song is indeed a promising young man, with so many people coming to consult him in just one month."

Song Mu simply smiled in response to Wang Shen's words. Wang Shen looked down at the documents in his hand, and for a while, the entire office was completely silent. Wang Shen finished reviewing the documents, but no one wanted to be the first to break this balance.

Wang Shen rolled up the stack of papers in his hand and finally looked up at Song Mu. "Dr. Song, I didn't come here entirely for Han Mo's sake." After Wang Shen finished speaking, the two fell into a brief silence again. Song Mu's expression changed slightly again; the eyebrows above his black-rimmed glasses twitched slightly, and a hint of worry appeared in his eyes.

"I'd like to hear the details." Song Mu picked up the water glass on the table with his left hand, took a sip of water, and said calmly.

Wang Shen nodded. "Sang? And Liang Li, do you know them?" After identifying the suspects, Wang Shen usually asked directly.

Song Mu's eyebrows twitched slightly again as he stared into Wang Shen's eyes, then naturally shook his head.

"Where was Dr. Song last night?"

“I stayed up all night in the office analyzing a patient’s file.” After saying that, Song Mu rummaged through his desk and found a file folder, which he placed on the desk. “This is this person’s file,” Song Mu said, pointing to the file folder on his desk.

Is there anyone who can vouch for you?

“My secretary also worked overtime with me last night. She left a little earlier than me, but it was already past midnight. That’s why I came to the office so late today. I can’t help it, I’m getting old, my body can’t take staying up late anymore.” Wang Shen chuckled self-deprecatingly.

Wang Shen analyzed Song Mu's words. Song Mu's alibi and the secretary's account were largely consistent. However, this alibi had several flaws. First, as someone close to Song Mu, the secretary might have fabricated an alibi for him. However, this possibility was relatively low. For Song Mu, his purpose in creating the alibi was to commit murder. Therefore, he certainly didn't want more people involved. Even if the secretary didn't know Song Mu's purpose, if one day the secretary revealed that he had deliberately created the alibi, it would be a fatal blow to Song Mu. Second, even if the secretary wasn't lying and truly saw "Song Mu" in the office all night, it didn't necessarily mean that the person sitting in the office was Song Mu himself. Wang Shen had used this tactic in high school. Although Wang Shen was an excellent student, he was sometimes encouraged to go out and play games. Because Wang Shen's school was a boarding school, the dormitory supervisor would check the rooms every night. However, the supervisor wouldn't check very thoroughly; he would simply stand at the dormitory door after lights out, shine a flashlight on each bed, and leave after confirming that someone was in each bed. Therefore, Wang Shen bought two extra pillows. Normally, there was only one pillow on Wang Shen's bed, but in special circumstances, the other two pillows would appear under his blanket. It's simple; this method is called using "dummy pillows." The dormitory supervisor, seeing the bulge on the bed, naturally wouldn't suspect anything. Using this method, he could escape unscathed.

From this perspective, if Song Mu used the same method, he might be able to fool his secretary and have her provide him with a perfect alibi.

"Dr. Song is indeed dedicated, but a murder occurred yesterday in the bar street not far from the city center. The deceased was Liang Li." Wang Shen didn't want to beat around the bush any longer.

"Oh? Really? I thought the public security in society had improved a lot thanks to the efforts of your police. It seems that it's still not advisable for women to go out alone late at night."

"You seem to have no surprise at all about this murder?"

"Maybe so, but I'm not very good at expressing myself. Besides, after witnessing so many patients' tragic experiences, sometimes I think it would be better to die." A brief sadness crossed Song Mu's face, but she quickly regained her composure.

“Dr. Song is so pessimistic about the world.” Wang Shen stared intently at Song Mu, carefully observing his changing expressions. “Liang Li doesn’t have a proper job and often hangs out at a bar called ‘Nothing’ at night. She’s friends with Sang and knows a lot about her. Among other things, she mentioned seeing a handsome man give Sang some money. I’m wondering if that’s what led to her murder?”

"Maybe." Song Mu's expression remained indifferent. "Would you like more water?" Song Mu stood up from her chair, holding her water glass, and asked Wang Shen. Wang Shen shook his head. Song Mu then walked to the water dispenser and refilled her glass. The sound of the flowing water was clear and subtle, much like the sound of a human heartbeat.

"When I was reviewing the surveillance footage, I found a suspect. From the back of the suspect, Dr. Song, he really looks like you."

Upon hearing Wang Shen's words, Song Mu's hand, which was pouring water, trembled involuntarily, but then returned to normal.