Qin Zhibo looked at the plan and found that the content did not contain the answer to the secret room technique.

When creating the puzzle, Tsutsumi and another hired support staff member, Kotani Renzo, can work together to complete the secret room.

Of course, in the case of decryption, it must be explained that Mallet Tail was stunned and then put into the secret room.

After the puzzle is revealed, the high school detectives can hand over their answers to Kotani Renzo.

Jia Gulian repeatedly put the technique under the floor mat at the door of the toilet, and the director behind the scenes judged whose answer was closer to the truth.

Seeing these contents, Qin Zhibo became even more certain that the person who organized and organized this "Detective Koshien" was Junya Tokijin or Nanatsuki Koshisui.

The routine is exactly the same as the Twilight Annex. The answers are placed somewhere and then viewed by the organizer hidden behind the scenes.

The organizers of that party were Food Detective and Wheelchair Detective.

The party was organized by one or both of the two high school detectives.

Could it be that the high-end bureaus of these detective organizations like to refer to the stories written by Agatha Christie?

If these two gatherings are considered similar, then the puzzle itself should be the key to the puzzle that the party initiator wants to solve.

For example, in the Dusk Annex, the gourmet detective and the wheelchair detective want to know the true meaning of the secret code for treasure.

And this time the secret room technique should also correspond to an old incident.

Qin Zhibo continued to look at the project and found some clues in the details.

Among the details, Kotani Kenzo is required to provide a tool box in each contestant's room. The tools in the tool box include but are not limited to hammers, pliers, screws, woodworking adhesives, wires, etc.

In addition, a pot of blooming lavender should be placed in the living room, dining room, toilet, and everyone's room in the cabin.

Obviously, these two special requirements are tips given by the organizer.

The toolbox explains that to implement real secret room techniques, you need to use the tools in the toolbox.

The large amount of lavender placed in the cabin should be some kind of symbol or reminder.

Thinking of this, Qin Zhibo looked again at Zhuowei, who was sitting opposite, and asked: "When it comes to lavender, what can you think of?"

"Lavender?"

Hammertail slumped his shoulders, thought for a long time, and then shook his head.

But Qin Zhibo knew that lavender must be a clue and should be related to these detectives.

Therefore, lavender should suggest a certain case.

And Hammertail was chosen to implement this plan not entirely because of his financial constraints.

So Qin Zhibo asked further, "Lavender should be related to a certain case, and maybe it is related to you too."

"Besides, do you really not know Kotani Renzo?"

"You must tell the truth, otherwise if I find out that you are not telling the truth, I will definitely make you miserable!"

Hearing this cold threat, Hammertail was so frightened that his shoulders trembled and cold sweat broke out on his forehead.

After being silent for a long while, he lowered his head and began to talk.

"When it comes to lavender and cases, what I know is a case that happened on Shikoku Island a year ago..."

"The place where that case occurred is called Lavender Villa. A wealthy family's daughter hanged herself in a room of the villa, so it is also called the 'Lavender Villa Case' by the locals."

Qin Zhibo raised his eyebrows, "So you were the murderer in that case? Are you actually a fugitive murderer?"

Hammertail's expression was shocked, and he quickly waved his hands to deny, "I'm not the murderer!"

"I learned about that case half a year after it happened."

"Actually...my original occupation was a pickpocket..."

Qin Zhibo: Your little hands are not clean now either.

"Six months ago, I pretended to be a cleaner and went to the Lavender Villa that had been idle for half a year to clean it."

"At that time, in order to facilitate my break-in, I removed the screws from the window of one of the rooms in the villa and glued it on with adhesive. I thought I would sneak in at night and get some valuable things."

"Jiagu Renzo was the one who hired me as a cleaner at that time. I heard that he was originally the housekeeper of Lavender Villa..."

"So I really haven't killed anyone!"

Hammertail revealed all his background just to prove that he was not a murderer.

As everyone knows, Qin Zhibo has long known that this man who only knows how to steal will never have the guts to kill anyone.

However, Lu Xun once said that if you want to open a window in your house, you should remove the roof of the house, and people will agree to open the window.

Therefore, in order for Tsutsumi to confess his miserable past, he must be given a bigger hat.

"What happened after that?" Qin Zhibo asked next.

"After that..." Tsutsumi continued to lower his head, "I don't know much about what happened after that, but I heard that the local police overturned the 'Lavender Villa Case' half a year ago."

"The rich man's daughter was actually murdered. The murderer was the maid of the villa. The maid later committed suicide out of fear of the crime..."

"That's all I know."

Qin Zhibo nodded understandingly.

After sorting out the whole incident, it is now almost certain that the purpose of the organizer was this "Lavender Villa Murder Case".

However, the content of the case told through the mouth of Tsutsumi is too sketchy and not enough to restore the entire truth of the incident.

Fortunately, there are people at the police station.

…

After coming out of the apartment building, Qin Zhibo took the project plan away with him.

Back in the car, Sera asked anxiously: "Why did it take you so long to come out? I thought something had happened to you!"

Qin Zhibo handed her the project and sat in the driver's seat.

"I had a chat with the fake director, so I spent a little more time."

"Fake director?"

There was some confusion in Seriang's eyes, and he immediately opened the plan to check it out.

Qin Zhibo drove directly to the Tokyo Metropolitan Police Department.

When he arrived at the entrance of the Metropolitan Police Department, Qin Zhibo directly called Officer Mu Mu.

After receiving a call from Qin Zhibo, Mu Mu thought the daily performance had come again.

It turned out that I wanted to check the files of a previous case.

"The case that happened in Shikoku..."

"No problem. Shikoku's case files must also be reported to the Metropolitan Police regularly. I will ask Takagi to send them to the office for you later?"

Qin Zhibo replied: "Don't bother me. I'm outside the Metropolitan Police Building now. Just let me take a look at the contents of the file."

"Okay, I'll ask Takagi to pick you up now..."

After a while, Takagi Wataru, the gold medal male publicist of the Metropolitan Police Department, came out of the front door.

"Hello, Mr. Qin."

Gao Mushe came over to shake hands with Qin Zhibo, and saw Shiliang behind him, and asked in confusion: "Excuse me, who is this..."

"This is my new disciple."

Qin Zhibo introduced him like this, and Shiliang Zhenshun was not unconvinced at all, but skillfully stepped forward to say hello.

"Hello, my name is Sera Masumi."

"Ah, hello..."

Sera grinned, making Takagi a little stunned. He was obviously a boy, but his smile was a little cute?

"The file is in the archives. Come with me."

Under the leadership of Gao Mushe, several people came to the archives room.

The huge archives room collects major case files from all over the country, but 80% of them are from the Tokyo area alone.

Wataru Takagi is worthy of being the gold medal investigator of the Metropolitan Police Department. In just 10 minutes, he found the "Lavender Villa Murder Case" file from countless files on the shelf.

"The files are here, I won't disturb you anymore."

Takagi left sensibly, leaving Qin Zhibo and Sera Masumi behind.

The two opened the file and read it carefully.

On the way to the Metropolitan Police Department just now, Masumi Sera read the project case she got from Tsutsumi, and coupled with Qin Zhibo's introduction, she had a rough idea of ​​the ins and outs of the incident.

After reading the "Lavender Villa" case file, the context of the entire incident became clearer.

The investigation of this case is divided into two stages.

The first stage is that after the case occurred, the police searched the scene and combined with the confessions of people around them, they believed that the wealthy lady had hanged herself.

In the second stage, half a year after the incident, the police restarted the case investigation and discovered new evidence at the scene.
To be continued...