In the square-faced men's room on the second floor, the forensic staff examined the bat brought to the other side's face, and found no bloodstains, but traces of adhesive tape.

"Are you going to use this bat against the Red Girl?" Yui Uehara watched from the side.

"yes, but if it's a ghost, ......"

"How?"

Yuki Uehara asked.

"Is it a murder weapon?"

"There are no obvious injuries," the forensic officer responded, "and the luminol reagent did not respond, it should not be a murder weapon used to beat the victim, but it seems to have something pasted on it, and it feels a little slimy." ”

"I don't think you need this as a murder weapon, the dumbbells in the bath are enough," Gao Cheng glanced around the room and asked, "There is an air conditioner in this room, why is there an electric fan?" ”

"It's said that a guest who doesn't like to blow air conditioners turned out of the storage room," the square-faced man said uncertainly, "and just threw it here, right?" ”

Gao Cheng fell silent.

The room was located just above the living room, and according to Ran and Sonoko, the sound of Miss Suuka vacuuming was heard, the buzzing sound, and the thump of hitting the wall.

When I questioned Minegishi Zhumi, who was in the kitchen at the time, she said that she was cleaning up the kitchen and preparing for dinner by the way, and Minegishi Zhumi also talked to the two gardeners in the living room next door, and she didn't leave the kitchen until they came back.

In other words, if Miss Chengxiang uses any method to make Yuan Zi and Xiaolan hear the sound of the vacuum cleaner, she will have the opportunity to commit a crime in the bathroom on the first floor.

The only sound of the vacuum cleaner, and the thump of the knock, doesn't mean anything......

When leaving the square-faced man's room, Gao Cheng called Yui Uehara: "Miss Yuyi, there are some things I want to ask." ”

"Huh?" Yui Uehara looked puzzled.

"Has there ever been an empty door in the villa around here?" Gao Cheng asked directly.

There are two key parts of the current case, the murder of a red girl 15 years ago, and the death of a young girl 12 years ago.

This is also the reason why he didn't break it even though he suspected Chengxiang.

The lack of information can easily lead to errors in judgment, and now that there is plenty of time, it is necessary for him to solve all the doubts.

After discovering the body, he thought of many things.

First of all, there are traces of the Red Girl's villa, obviously someone has been in and out, but that villa can't live, if someone really lives in this forest, they must go to other villas.

There may be news from the police.

And then it's about Chengxiang......

During lunch, Bo Gu heard the reaction of the woman in red very strangely, not thinking of the red girl, but thinking of his classmate Congzi for the first time.

The problem is, he asked from Suzumi Minegishi that Satoko didn't wear any red clothes on that day 12 years ago......

Finally, there is Chengxiang, who met for the first time, obviously everyone was present, but without knowing which one was Shiliang's innocence, he directly handed the photo to Shiliang, which was different from everyone else.

"How do you know?"

Uehara Yui looked at Gao Cheng who was asking seriously.

"Since more than a decade ago, people in nearby rental villas have called the police, and unlike the pranks of breaking windows and throwing things, there are signs that someone has picked the lock on the door and sneaked in for a while, and there are occasional testimonies of seeing suspicious figures in the forest......

Therefore, the Nagano Prefectural Police have not been able to conclude that the bones sunk in the swamp are the Red Girl. ”

"Is it all at this time?"

Gao Cheng's expression was slightly condensed, and he took out a photo and continued to ask.

"This is a photo taken by Mr. Bogu and them here 12 years ago, at noon on the day of the disappearance of their classmate Congzi, and the girl in the middle wearing a beige short jacket is the same Satoko......

Is it really this girl found in the swamp? ”

"There shouldn't be anything wrong with that," Yui Uehara took the photo and looked at it, "I found out that she was still an intern at the police academy back then, and the officer who was in charge of patrolling Xiao Dare and Officer Zhufu, but ......"

Yui Uehara said strangely: "Listen to Xiao Dare, when I found out, she was wearing a long red coat, just like a red girl." ”

"One more thing," Gao Cheng asked with bright eyes, "Is there a report on the murder of the naked girl that happened 15 years ago?" The forest should have been carefully searched after the crime, why did not find the murder weapon at that time, but it appeared three years later? Three years have passed, it should be more difficult to find. ”

"Probably because it was covered by leaves, and when I found it, it was under the leaves."

Yui Uehara just heard from Officer Yamato about it, and he didn't know the specific situation, so he was slightly embarrassed.

"And it seems that the swamp was not searched 15 years ago, and the report said that the policeman at the scene was slashed by the naked girl with a knife, so he may not have had time to chase it......"

"Slashed with a knife?"

"Yes, I resigned after that, and now I work in the video game city, Xiao Dang just went to him today to ask about the situation, so I didn't come, because this murder may be related to the red girl......"

"Miss Yuyi, can you ask everyone to meet in the living room again?"

Gao Cheng fell into thought.

He probably knew what was going on.

There is indeed a person in the forest, and the empty door that has appeared every time for more than ten years, as well as the traces of entry and exit on the side of the Red Girl's villa, if there is no accident, it should be the staff lover who also witnessed the Red Girl's murder back then.

The fact that there was more dust in the bedroom than elsewhere also points to this possibility.

Although it is a third party, it should be not a small stimulus to watch your lover being brutally killed.

However, the woman in red that Xiaolan and Yuanzi saw in the forest was not her, but Cheng Xiang disguised it in order to create the illusion of a red girl, because after hearing the conversation, she knew which person was Shiliang Zhenchun.

That lover may have been looking for revenge on the red girl, and now it seems that Satoko, who fell behind 12 years ago, is likely to be attacked because he was wearing a red jacket and was treated as a red girl.

The truth from 12 years ago......

……

"What? It is already known who killed Bogu? ”

After the rain, the villa suddenly lost power, but Yui Uehara still asked everyone to light the candlesticks and gather in the living room.

"Isn't it a red girl?"

"Of course not," Gao Cheng followed Yui Uehara into the living room with Xiao Ai, "The person who killed Mr. Bogu has always been in this villa, and it is among these people at the scene......"

"So it's all said," the square-faced man frowned, "The time of the crime was when Chengxiang and the others were cleaning the room on the first floor, and at that time I went out to buy things and didn't come back, and Zhumei has been in the kitchen, do you want to say that the murderer is Zhumei?" ”

"It's impossible for Miss Zhumei to commit a crime," Gao Cheng shook his head, "It is estimated that it will take several trips to move the tomatoes covering the entire water surface of the bath and a few dumbbells from the sunken corpses into the bathroom, and it will be easy to be discovered, because Miss Chengxiang will also clean the corridor by the way when they clean the room on the first floor." ”

"What the hell is ...... that?"

"It's very simple, whether it's tomatoes or dumbbells, they were already in the bath earlier, and the real time when Mr. Bogu was killed was actually before Xiaolan and the others tested the water temperature."

Gao Cheng reasoned.

"Because of the addition of green bath salts, I couldn't see anything at the bottom of the pool, and Mr. Bogu's body was pressed into the water by dumbbells at that time, but I couldn't touch the temperature of the water.

"The reason why everyone thinks that the time of the crime is after that is nothing more than because of the tomatoes, but this is just a trick played by the criminals, in order to make people think that the tomatoes were put in after testing the water temperature, so as to obtain an alibi for themselves."

"But," said Xiaolan hurriedly, "when I tested the water temperature, there were really no tomatoes." ”

"It just didn't surface."

Gao Cheng asked Xiao Ai on the side to take a tomato and put it in a glass kettle to demonstrate the situation of the tomato sinking to the bottom of the water.

"Tomatoes with high sugar content are different from ordinary tomatoes in that they sink underwater, but as long as the salt concentration is sufficient, the tomato will float again.

Dissolve a part of the salt in the water in advance, so that the tomato reaches a critical state that is about to float, and finally as long as you sprinkle a little more salt, you can change the balance, and the tomato will naturally surface.

It's the same as what the murderer did in the bathroom, yes, the murderer is Miss Chengxiang who entered the bathroom first, and she doesn't need to bring anything, just add the last bath salts to the bath as soon as possible to complete this technique. ”

Feng'an Zhumei and a few people followed Gao Cheng's gaze to look at Chengxiang, whose face had changed greatly.

"Cheng, Chengxiang killed Bo Gu?"

"How is this possible?"

The square-faced man reacted strongly and said, "Where does Chengxiang have this time?" ”

"Of course there is, even when she is cleaning the room on the second floor alone, the sound of the vacuum cleaner is there as long as it is on, and as for the sound of hitting the wall, you can make it with anything."

Gao Cheng said calmly.

"Upstairs in the living room is Mr. Ren Tian's room, probably a bat, pasted thick cardboard to make wings, and then hung on a pillar, with an electric fan set to shake the head across the pillar, the bat blown by the wind will hit the pillar after falling, and there is a hook on the pillar."

"How could it be ......," the square-faced man opened his mouth to look at the silent Chengxiang.

"Even if you quibble, it's useless," Gao Cheng finally said, "I'm afraid you have discovered yourself that the cuffs that were soaked with high-concentration salt water when the corpse was sunk have dried up and crystallized with salt...... Because after the incident, the sleeves that had been put down before were now rolled up. ”

"But what the hell is going on?" The square-faced man said anxiously, "How could Chengxiang kill Bo Gu?" ”

"I think it's because of Satoko who died 12 years ago."

Gao Cheng paused and said to Cheng Xiang.

"Satoko, who was obviously wearing a beige short coat, was wearing a long red coat when the body was found, probably not by accident, but deliberately trying to play a prank, playing the role of a red girl and joking with everyone, and something happened.

"Actually, there is a woman moving around in this forest, and she comes here every year at this time to look for revenge on the red girl, and Satoko may have fallen into the swamp after her pursuit.

The evidence is the kitchen knife murder weapon that fell on the edge of the swamp, which was not found 15 years ago, but was found 3 years later, and the real reason is that it was not the red girl who dropped the murder weapon, but the woman who chased Satoko. ”

"But what does this have to do with Bo Gu?!" The square-faced man said bitterly, "If what you said is true, isn't it the woman's fault?" ”

Cheng Xiang raised her head, sweat broke out on her face again: "A woman looking for revenge on the red girl?" ”

Next to him, Yui Uehara couldn't help but look at Gao Cheng in surprise.

Why does the truth seem to be so complicated? Have you even found out this kind of thing?

"Miss Chengxiang didn't know and should have been, after all, even the police didn't know about it," Gao Cheng continued, "The reason why he killed Mr. Bogu was because he heard that the woman in red had a strange reaction in the forest, right?" ”

"Yes, that's right......"

Chengxiang looked at Gao Cheng in a daze, feeling that the whole person was seen through at once, but she didn't expect anyone to find out to such a point, not so much a detective, but a murderer, who even understood her better.

Tears flowed down her cheeks.

"I found out after asking the police a few years ago, and Satoko was wearing a red jacket at the time......

She was going to pretend to be alone when everyone went to search the forest, and then pretend to be a red girl, but this prank requires someone to lure us to her, and I only learned today that person is Bo Gu......

If he had told the truth at that time, maybe Satoshi would have ......"

"Bang!!"

With a flash of lightning, the glass window of the living room was suddenly smashed, a long-haired black shadow suddenly opened the window, and crawled into the living room with a painful pant, his wide eyes stared straight at Cheng Xiang who was sitting next to Gao Cheng, and raised a sharp kitchen knife high and pounced.

"Whew!"

The candle was blown out by the wind and rain, and Cheng Xiang, who faced the black shadow with long hair, screamed in horror, and even though Gao Cheng stopped behind her, she still stumbled and fell off her chair.

"Senior!"

"Detective Joto!"

Shiliang Zhenchun and Uehara Yui were the first to react, and almost immediately, Shiliang Zhenchun rushed to the front of Gao Cheng.

"You guy!"

Shiliang Zhenchun protected Gao Cheng, shouted loudly, swept his legs with lightning and knocked off the sharp blade in the hand of the long-haired black shadow, and together with Yui Uehara, he restrained the long-haired black shadow who let out a terrible cry.

"Red, Red Girl!!" In the living room, the garden retreated to the corner in fear, shivering with Xiaolan.

Gao Cheng was stunned for a moment, and hurriedly explained: "She is not a red girl, but a victim of the red girl incident, the lover of the killed clerk, there is still an empty door in the nearby villa, and the suspicious figures who have been haunting the forest for more than ten years are all her." ”

"Is that her?"

Everyone re-lit the candles, and only then did they see the appearance of the long hair and the dark shadow.

It's an ordinary woman covered in mud and water, crying and flowery, completely ignoring the police who suppressed her, always staring at Chengxiang hiding behind Gao Cheng, as if she was going to bite with her teeth as long as she let go of her hand, and the whole person was immersed in pain.

"Enough is enough," Gao Cheng squatted in front of the woman who kept struggling, "The real red girl died 15 years ago, and your revenge should have ended a long time ago." ”

The woman slowly turned her head, met Gao Cheng's gentle gaze and finally calmed down, and then looked at Cheng Xiang's true face, as if she recognized the reality, and cried with a wow, along with the pain of more than ten years, all into the cry.