Song Mu stood next to the water dispenser, turned around, and looked at Wang Shen from a distance, and he hadn't forgotten to show a casual smile on his face. "Officer Wang is really joking."

"I'm not kidding you. Last night's so-called research patient data was all fake, and you went to that bar, and there's a good chance you found me. Believe me, I have a lot of evidence to prove this fact. Wang Shen didn't respond to Song Mu with a smile, and the expression on his face became more serious.

"You forget, I have an alibi. My secretary is my best witness. Song Mu didn't move his steps, still standing next to the water dispenser, holding a water cup and taking a sip of water.

"I've heard that some people drink more often when they're nervous. Drinking water is said to help relieve a person's nervousness. Dr. Song, is there such a statement in your field of psychology? Wang Shen stared at the water cup in Song Mu's hand and said a digression in an indifferent tone. Song Mu's hand holding the cup trembled visibly, and fell into a brief silence.

"Some people are, and some people don't." Song Mu returned to his desk with a glass of water and sat down on the chair again.

"So does Dr. Song belong to some people, or is it someone else?" Wang Shen didn't pay attention to Song Mu's expression when he spoke this time. "As for your so-called alibi, it can be easily overturned. This game you played, many people played it when they were students. At that time, we called it the 'dummy trick'. ”

Song Mu narrowed his eyes slightly, a little cold light appeared in his eyes, and there were doubts. Wang Shen raised his head and glanced at Song Mu, and seeing that Song Mu didn't mean to speak, he continued: "You must want to say, all this is just my guess. Well, that's true. However, I had a few conversations with your secretary when I first arrived, and found out that you are not allowed to enter your consultation room. The consultation room is separated from the outside lobby by frosted glass, so you can't see anything during the day, and at night, when the light is turned on, there will be a blurry figure when anyone stays here, right? All you need to do is have a tool that is about your size, maybe a large puppet or something. In short, just let the secretary see the vague outline of you sitting at your desk. In this way, the perfect alibi is born. ”

"Officer Wang, if there's anything in you that deserves my admiration, it's your amazing imagination." Song Mu smiled and shook his head, originally wanted to pick up the water cup again, but Song Mu just moved his fingers and gave up the idea. "The secretary watched me enter the office, and I didn't leave the office in the meantime. You can check this with her immediately. ”

"Don't you think that sentence exposes your problem?" Wang Shen smiled and shook his head. "Contrary to your secretary's words, you've been in the office since the day. If you've never left the office, then ......" Wang Shen paused and looked at Song Mu meaningfully. "So how did you solve your personal problem? I looked at the consultation room and it didn't seem to be equipped with a toilet. You wouldn't tell me it was solved with plastic bottles, would you? Wang Shen made a joke, but Song Mu didn't think the joke was funny at all.

"This is my personal privacy, so I don't have to worry about Officer Wang. The fact that the secretary saw me enter the office, and the fact that I didn't leave the office, is enough to show that I didn't go to the bar last night. ”

"The secretary saw you enter the office, and it was probably the truth. But it's an assumption that you didn't leave the office. Wang Shen shook his head again and denied Song Mu's explanation.

"Can I still fly out as a fly?"

"You really can't fly out as a fly, and I know you don't have that ability. Otherwise, I'll have a zoologist come with me today. However, although your counseling room is equipped with a toilet, the toilet is located outside the hall. You can have the endurance to go all night without going to the bathroom, but your secretary can't. When your secretary gets up to go to the bathroom, you quickly set up the dummy and leave the consultation room. Now that I think about it, it was a perfect plan. Also, I have observed the structure of this building, and the monitoring probes are only available in the elevators, not in the stairs. You just have to go down the stairs to avoid the probe, and everything really doesn't even seem to you. ”

"At the end of the day, it's all just your guess." Song Mu stared at Wang Shen and chuckled, and the expression on his face didn't show any more changes.

"When you get out of this building, there will be a surveillance look up on the road, and you should be able to photograph people entering and leaving. Of course, you are very clever and will definitely do all kinds of disguises so that we police will not be able to identify you. ”

"Since your police can't identify you, please wait until you have definite evidence before you come and talk to me about these words." Song Mu's mood began to fluctuate a little, and his tone became not so gentle.

Wang Shen took his eyes off Song Mu's face, and a little smug look gradually appeared on his face. Wang Shen took the paper cup in his hand, walked to the side of the water dispenser, and pressed the switch of the water dispenser. The only thing left in the consultation room was the sound of water gently hitting the bottom of the cup. Wang Shen poured a glass of water, followed Song Mu's example, took a sip, looked at Song Mu and said, "Doctor Song, don't worry, listen to me and talk about the case." ”

After speaking, Wang Shen drank all the water he had just poured in one go, and then left the paper cup in the trash can next to the water dispenser. "Liang Li was killed with a knife, the murder weapon should be a short knife, and the attack was in the chest. From this point of view, the murderer is still relatively merciful. At least, Liang Li didn't experience much pain before she died. This stupid woman probably thought that the murderer was going to rob the money, so she probably gave all the money to the murderer before she died. It's a pity that the murderer didn't care about this money at all, but it was this money that left us with good evidence. Dr. Song, do you want to know what valuable clues this money has left us? Wang Shen said as he walked towards Song Mu's desk, looking at Song Mu with an expression of appreciation in his eyes.

Song Mu's brows were already furrowed more obviously. Song Mu stared at Wang Shen, the ten fingers of his hands crossed and clenched.

"The alleys, as you probably know, are not always too clean. During the day, there are always small stall vendors who will spill some dirty water on the ground. Coincidentally, that night, there was still some dirty water on the ground. The killer probably didn't pay attention to the dirty water, so he stepped on the banknote. In this way, the note is left with a clear pattern on the sole of the murderer's shoe. ”

After Wang Shen finished saying this plot, Song Mu's brows furrowed even tighter, and at the same time lowered his head slightly to avoid colliding with Wang Shen's eyes.

"Originally, there were so many patterns on the soles that we didn't know where to start. However, this murderer is too rich......" Wang Shen walked to the opposite side of the desk and stared at Song Mu with dead eyes.