When he returned to the store after finishing the morning's class, Wu Ning was pleasantly surprised to find that Wu Jiu was awake, and he was lazily slumped on a wooden chair and crossed the black mountain.

"Boss, are you alright?"

Wu Jiu squinted at him lazily: "When did I have something?" ”

Wu Ning: ......

If you're fine, you're not a pig. Of course, this is mental activity.

"It's okay." Wu Ning suddenly felt refreshed, and even his troubled thoughts straightened out a lot.

"I just went to find the boss of the cow, but his house ...... There's no one in his shop, so it's great that you wake up. ”

Wu Jiu moved his shoulders noncommittally: "How is the commission for investigation?" ”

Wu Ning put down the book and poured a glass of water for the boss.

"I'm about to go to Sir Jin again, if Liu Ran did it, it is unlikely that he will buy a murderer, his family background is ordinary, and channels and money are problems for him. It's more likely to be hands-on, and there may have been someone in Sir King who had seen him. ”

If it's a waiter who does something with the drink, the security guard is naturally wary, but what if it's a guest? If you accidentally bump into it, the security guard won't care.

"Let's go." Wu Jiu got up slowly.

"Okay!" Wu Ning is in a good mood, and the boss will succeed immediately.

……

When they came to Sir Jin again, they paid the fare distressedly, and the two of them found Sun Xiang with ease.

Sun Xiang was obviously surprised, although he invited them to come over, but he didn't expect to be "okay" so soon.

Wu Ning flipped out Liu Ran's photo from his mobile phone: "Xiangzi, I have to trouble you, can you help inquire, on the day Zhou Yao was drunk, did anyone see this person in the photo." ”

"This ......," Sun Xiang hesitated.

It's not that he doesn't want to help, it's just that too much time has passed, and who remembers? Besides, there are so many people up and down Sir King, no matter how big his uncle's face is, he can't sell it.

Wu Ning saw his embarrassment, and had an idea: "Are your mobile waiters here permanent personnel?" ”

“…… Be. ”

"That's great, just ask them to identify it."

No matter how bold the murderer is, he can't go to the bar and poison indiscriminately, and the mobile waiter is the only chance to get his hands dirty.

Sun Xiang breathed a sigh of relief, there are only about a dozen mobile waiters in total, and this thing can be done.

"Okay, you send me the picture, I'll ask."

Sun Xiang was very efficient, and it didn't take long for him to come back, followed by a lively little music.

But the news he brought was not very good, and after asking all the mobile attendants, the answer was very consistent, and no one had ever seen the person in the photo.

"What the hell are you two doing, private investigator? Or the gossip media? Xiaole looked eager to try.

Wu Ning choked, they didn't seem to be any.

"Why do you ask so much? Isn't your private room booked, don't you prepare yet, join in the fun. Sun Xiang pushed him.

"What's the hurry, the guests don't come until six o'clock. Isn't this curious, Zhou Yao hasn't moved since the New Year, is it related to the last time he drank too much here? ”

I have to say that this Xiaole is a bit condescending to be a waiter.

Wu Ning's heart moved: "The private room you serve is fixed?" ”

"Yes, each person is responsible for three private rooms."

That......

Without waiting for Wu Ning to continue asking, Wu Jiu, who had not spoken for a long time, said lightly: "Take us to have a look." ”

Wu Ning's face fell, boss, we are asking for others, is this attitude ......

Xiao Le glanced at Wu Jiu, his face flushed slightly: "Okay, no problem." ”

Wu Ning: ......

Yes, you can eat both men and women.

……

The private room that Xiaole was in charge of that had received Zhou Yao was called Romantic Night, a name that was very in line with the taste of the industry.

This is not the peak season, it is reasonable to bring a few guests over to see the room, if Wu Jiu's appearance can be reduced a little, probably no one will notice them.

Walking into the romantic night, Wu Ning took a closer look.

Half of the walls are covered with liquid displays, high-end leather sofas, heavy coffee tables with marble surfaces, and a solid wood wine cabinet standing next to it, an ordinary nightclub layout.

If anything, it's probably just a long bar and a few bar chairs.

Wu Jiu glanced at it, his brows furrowed slightly, and his face remained unswerving.

"Boss, did you find anything?"

"Stinks."

Wu Ning: ......

The smell of the private room in the nightclub is naturally fresh and not anywhere, and the smell is not so good, if you have to describe it, you can probably use the word turbidity.

"It's been more than half a year, what flowers can you still see?"

Wu Ning, who complained on Xiaole's lips, but his eyes always followed, was a curious young man.

There is a separate bathroom in the private room, which is a bathroom instead of a toilet, and there is not only a toilet, but also a shower room......

Well?

Wu Ning pointed to a few white plastic bottles on the utility table: "How can you have such a thing?" ”

The blue label on the plastic bottle has been torn to shreds, but the word "acid etchant" is still faintly recognizable, isn't this something that only exists in dental hospitals?

Xiaole glanced at it and said indifferently: "Oh, a new employee brought it over a few years ago, saying that he had worked in a dental hospital before, and he thought it was very useful to clean up the filth, so he secretly took out a lot."

You don't know, the restrooms in places like ours are extremely difficult to clean, anyway...... Hey, don't tell me, this thing works really well. ”

Wu Ning's eyes widened, and his voice was raised: "Didn't you say that you haven't been a new employee?" ”

Xiaole looked at him strangely, and said casually: "You are asking about the new waiter who has never come, but that person is not a waiter, but a cleaner...... Our cleaners here are constantly changing, it's so normal......"

Wu Ning's head buzzed, like an initiation. His previous thinking was limited, it turned out that he was not a waiter, but a cleaner!

"The night Zhou Yao was drunk, there were also cleaners who came in to clean the room?"

"Yes," Xiao Le nodded as a matter of course, "regular cleaning to ensure that the room is tidy is the rule here." ”

Wu Ning suddenly realized that the cleaner would not attract attention when he entered or exited any room, nor would he make people feel that strangers had come in, because cleaning the room was originally their daily job.

He took two steps forward and grabbed Xiaole's arm, and asked anxiously, "What about the cleaner, is he still here?" ”

Xiao Le bared his teeth and shook his arm: "I have already left my job, and I heard that I have found a better job." Hey buddy, tap. ”

Wu Ning let go of his hand suddenly, the one who framed Zhou Yao must be the cleaner, it can basically be concluded.

Acid etching agent is an acidic liquid commonly used in dentistry, which can acidify the surface of tooth enamel and facilitate bonding with resin. If you touch the skin slightly, you only need to rinse it with water, but if you accidentally drink it, it will cause damage to your vocal cords.

And the peculiarity of the profession of a cleaner allows the other party to enter the room without arousing anyone's suspicion.

At that time, everyone must have been drunk, and he could pour part of the acid etching agent into Zhou Yao's wine glass without realizing it, and then swagger away, seamlessly.

Zhou Yao didn't know that the sore throat was caused by accidentally drinking acid etchants, so she missed the best time for treatment, and it was difficult to find out the cause of the problem later.

I have to say that the other party is thoughtful and bold, and he is either a habitual offender or an extremely difficult character to deal with.

Prisoner, found.