"Hmm......" Looking at the account book provided by the store manager, Qian Yu pondered.

The content of the record is very detailed and the entries are very large.

June 21 - 4 ready-to-eat bento, 2 DVDs, 3 bottles of oolong tea, 4 udon noodles.

May 24 – 3 ready-to-eat bento, 2 DVDs, 3 bottles of oolong tea, 3 udon noodles.

May 21 - 3 ready-to-eat bento, 2 DVDs, 5 bottles of oolong tea, 5 udon noodles.

……

From about the end of March to the present, the scale of the loss has been regular, basically maintaining the loss of six to eight meals plus a few bottles of oolong tea and finally two DVDs every three to four days.

If your estimate is correct, so much food should barely maintain a calorie balance for such a long time, and DVDs should be used to sell for money......

However, again, the thief does not have to do this, and stealing food or DVD alone will satisfy his needs.

Wait a minute, there may not be many ways to monetize DVDs, and if you can find out if there are any nearby places where you can pawn such things, you might be able to catch who did it.

Not...... This may not be a good idea, because it is entirely possible for a thief to sell it through private channels, such as to a friend. It is even possible for him to sell directly himself.

So, if you start with the other side - why do you steal these things every time Miss Nanagawa is on duty alone? Judging from the amount of food, this person deliberately stole the food that was just enough to last until the next time Miss Nanagawa was on duty alone.

In other words, he deliberately chose Miss Nanagawa to steal when she was on duty alone, why is that?

There are two possibilities - the first possibility is that the thief himself intends to blame Miss Nanakawa for all this, so that she can take the blame for himself. The second possibility is that Miss Nanagawa has a certain quality when she is on duty alone compared to others on duty, and this trait allows the thief to steal calmly.

It was at this point that Conan posed a question to Nanakawa.

"Sister Qichuan, have you ever found any special guests?"

"For example?" Nanagawa tilted his head.

"People who just look and don't buy," Conan reminded. "Since it's a thief, there's a good chance they're ostensibly just here to hang out."

"Hmm......" Nanagawa thought for a moment. There are two people who just look at it and don't buy it. One of them is a chubby game nerd, who reads game books in the game area from morning to night every day, and then leaves without buying anything. The other is an old woman who comes here every day......"

"I'm also very impressed with that old woman," the store manager seemed to know who Nanakawa was talking about. "I often ask for cheaper bento boxes that are about to expire, and we also learn the prices of other stores. However, this old woman is not a bad person, because she often asks me to turn off a few lights that are not in use, and then tells me how many degrees I can save on my electricity bill by adjusting the temperature of the air conditioner. ”

"Lights that don't work?" Qian Yu glanced around, only to find something strange where there might be a lamp. "Wait a minute, you have security cameras here?"

"What?" The rest were stunned.

"Yes," the manager nodded. "That's why I was able to confirm that no guests had stolen anything. However, the cameras will be turned off after the store closes each day. After all, the consumption of electricity bills is not small, and the existence of the camera after the roller shutter door is closed is of little significance; Second, I installed the security camera for the first time, and I asked if this guy did it - I was trying to make sure it wasn't the customer who took the lost item. ”

"In other words, if someone sneaks into this place through some means, this security camera is useless?" Qian Yu asked.

"Doorway?" The store manager shook his head. "No way, except for the entrance sealed by the roller shutter door, all the rest of the store is built with concrete walls, and there is no way to pass through it."

"Do you have any place here where you can hide?" Conan asked suddenly. "Is it possible that someone hid somewhere before closing the store and then waited until the next day to open before swaggering out?"

"There shouldn't be such a place here." The store manager shook his head. "I renovated this shop with my own hands, and if there really is such a place, I can't be unaware."

"Even if the thief could have hollowed out somewhere and hid it?" Conan asked rhetorically. "If he thinks there's a chance you'll find this place, he's obviously not hiding there, is he?"

"And how are you going to prove it?" The store manager asked.

"We need to take a closer look at this," Chiba replied. If the thief wanted to leave the shop, he would make sure that the place where he came out of his hiding place was not strange, that no one could suspect why he was there, and that he could not be seen when he came out of it. At the same time, one question he can't avoid is what he can do with the food he has stolen - given the presence of these security cameras, he can't just take them out, and can only hide the rest somewhere after eating, which requires a certain amount of space to do. A space that can hold more than 70 pieces of lunch boxes and more than 70 bottles of oolong tea. ”

"Is there a basement here?" Conan asked. "If not, are there any vents? Smaller people are likely to hide in ventilation ducts, where people look unlikely. ”

The store manager immediately subconsciously looked at the ceiling overhead. "Yes, there are ventilation ducts, and there is a place where the entrance is wide open so that you can get in and access it if something goes wrong."

"Where?" Qian Yu immediately asked.

"In the bathroom." The store manager led everyone to the place where Nanagawa had been reprimanded just now, and then pointed to a door not far away. "That's the bathroom over there."

"In the bathroom, there is another person who is very strange......" Nanagawa suddenly thought of something. It was a very modest white-collar worker, who always gave up his place when he was queuing up to go to the toilet and let others go to the toilet first. ”

"It should be that person," Qian Yu nodded. "He gave up his position to make sure he was the last one to go to the toilet so that no one would see him go to the toilet – and no one would wonder why he disappeared when he entered the toilet."

"Is that really going on!?" The store manager was stunned, and then his face showed anger. "I'll take a look!"

As he spoke, the store manager aggressively picked up a steel pipe from the side and walked to the toilet.

"Oh......" Qian Yu raised an eyebrow. Whoever it is, someone is sure to be beaten within a minute. ”

"Huh?" The store manager stopped and looked at Chiba.

"If there are people up there, Uncle Storekeeper, you may suffer a loss if you go up like this." Thousand Feathers shrugged. "There is also an adult man on the other side, can you guarantee that the store manager will not miss?"

"So what to do?" The store manager asked.

"Remove the ventilation window and give him an ultimatum telling him that if he doesn't come out, he will have to call the police." Chiba suggested. "Even if the thief wasn't hiding here, they could have checked it out. Take 10,000 steps back, and even if you really don't find the thief, you can call the police to come in handy, right? (If the thief is not found, then you can only determine that Nanagawa is suspicious, and then invite Nanagawa to the Metropolitan Police Department for tea)"

At this moment, Qian Yu suddenly raised his head, revealing a look of shock, but quickly turned into a smile - the analysis system of the auxiliary unit filtered out the sound of the soles of leather shoes colliding with metal pipes, and the direction was directly above them.

"Well, it looks like Mr. Thief is hiding here."

"Then I don't bother you," the store manager sneered. "This kind of thief, just hand it over to the police."