Mihua is a high-end apartment building, and Gao Cheng followed Xiao Ai and Ayumi and a few children into the elevator to go to the cat owner's house.

"But why is Brother Chenghu here?" Mitsuhiko was surprised, "Don't you dislike cats?" ”

"You don't want to adopt a captain, do you?"

"It's impossible, even if that uncle doesn't raise it, he should sell the captain, after all, it's worth 20 million yen......"

"Don't think about it," Gao Cheng said with black lines on his head, "I just want to see how that cat is worth twenty million." ”

"Mr. Mashiko's house is in front of ......"

After getting out of the elevator, Conan went to the front to lead the way, and suddenly found two people unlocking the door of the room.

"Mr. Mashiko!" A fat uncle opened the door with the anti-theft buckle hanging on it, and shouted through the crack, "I'm the administrator, are you okay?" ”

"What's wrong?" Gao Cheng ran forward and asked, "Is something wrong?" ”

The man dressed at home next to the caretaker responded, "I heard a strange noise next door......"

"Meow!"

A tricolor cat came out of the crack in the door and saw everyone meowing, leaving a string of blood-red cat footprints on the ground.

The man at home was frightened: "Blood...... There is blood on the cat's feet! ”

Gao Cheng picked up the cat and looked inside the room, and shouted in a deep voice: "Hurry up and call an ambulance!" ”

The administrator shouted, "Don't you call an ambulance if you don't know what's going on?" ”

"It's not a trivial matter to be able to make bloody footprints come out, and the owner of the room has not responded."

Gao Cheng handed over the three-color cat to Ayumi, took out the fishing line and chewing gum from his arms, first tied the fishing line to the anti-theft buckle U-shaped buckle rod, adjusted the knot to the top of the U-shaped buckle rod and fixed it with chewing gum, and then took out a piece of iron wire, bent it into a U-shape and fixed it next to the anti-theft buckle on the inside of the door with chewing gum, and hooked the fishing line.

Preparing for the work, Gao Cheng gently pulled the fishing line to close the door, and finally pulled hard, only to hear the sound of a lock in the door, and the anti-theft buckle was easily opened.

"The door is open?"

The management officials on the side looked at Gao Cheng in a daze, and Conan, who witnessed Gao Cheng unlocking the lock, collapsed his eyelids speechlessly, and asked in a low voice: "I said Chenghu, why do you have these things with you?" ”

"It's just...... Take it with you just in case. ”

Gao Cheng hurriedly opened the door and hurried to the inner room following the cat's footprints on the floor.

God knows how he would carry the tools to pick the lock, and he didn't think he would use these things to pick the lock, but the thief happened to have this kind of U-bar lock opening method inside the door.

The cat footprints in the room extended directly from the bedroom inside, and Gao Cheng just walked through a corridor to find a fat man who fell in the bedroom, his head was covered with blood, and there was a puddle on the ground, but fortunately, there was still a faint pulse, and it was not too late.

View from the scene......

There was an upside-down chair on the bed, the lampshade was turned on directly above, the floor next to the corpse was still littered with fragments of lamps, a new lamp was placed in the corner, and the bedside table was stained with blood, which looked like it had accidentally fallen and hit the bedside table while changing the lamp.

However, it is not an accident.

The fat uncle is wearing slippers on one foot, and there is no reason not to take off his shoes when he stands on the bed to change the lamp, and the chair on the bed is also directly on the soft and uneven quilt.

There are also fragments of lamps on the ground, and the lamps in question will be blackened on both sides, but the fragments on the scene are not......

These suspicions all point in one direction, and the scene is just disguised as an accident.

Locked Room Killings......

What the hell.

Gao Cheng stood up and looked at Conan, who was still inspecting the scene next to him.

Can you also run into cases like this?

Soon after the ambulance took away the fat uncle, the police car also rushed to the downstairs of the apartment, and Gao Cheng checked the access control system in the room by the way.

Because it is a premium apartment, there is a curfew in the lobby on the first floor, and anyone who rings the doorbell is recorded, and there are three people in the hour before their visit, and everyone has their name on it.

The murderer is likely to be among these three people.

Because the neighbors heard strange noises that happened to be at this time.

Of course, it is not excluded that someone did not ring the doorbell, but entered the apartment while the other residents were out, as if he and a group of children, who said they wanted to surprise the cat owner.

What do you say, the owner of the cat will be surprised to see him, a detective, come to visit......

The scare is pretty much the same.

Gao Cheng interjected and looked at the living room.

There was also wrapping paper and an old pet basket for cats on the coffee table, which seemed to be intended to be given to someone as a gift, and there were traces of residual tape and folding on the wrapping paper, and there were several broken places, as if they had been wrapped and then opened.

There are scissors and tape next to the wrapping paper, indicating that it is indeed on-site packaging, but there is no colored ribbon for gift wrapping in this room.

The key is to find out who the last guest to enter the cat owner's house is, or the last guest to leave.

Judging from the situation at the scene, the prisoner should have improvised murderous intent, and the methods were all conceived and arranged on the spot, which means that the three visitors were very suspicious.

The reason why the key is the last guest to leave is because these people need someone here to help open the door when they come in.

"Officer Sato!" Takagi arrived at the scene with 3 suspects, "I have found the three people who were recorded by the access control system!" ”

"So fast?"

"Because the address book has contact information, but it's ......"

Takagi looked at the three people outside the entrance in distress, a fat aunt, a freckled woman with glasses, and a bearded man who also wore glasses.

"Only the first tavern proprietress who came into the room showed her mouth, the second Miss Aso just chatted a few words at the door, and Mr. Uruchiya, who came last, said that he rang the doorbell at the door, and went back without responding."

"Hmm," Sato crossed his arms and observed a few people, "It's all suspicious, maybe the second person came before the first guest left, and after the second person left, the first person can also commit crimes......"

Gao Cheng also glanced at a few people in the back.

It's not a question of who might commit the crime, it's just about who lied.

Mr. Uruchiya, the third person who entered the apartment, said that he rang the doorbell at the door and left after seeing that there was no response......

Normal people should wonder if something is wrong, because they have let themselves into the apartment, and there is no reason not to be at home or ignore themselves.

"Mr. Uruya," Gao Cheng asked the bearded man with glasses, "You were the last to come, was it Mr. Mashiko who opened the door to you on the first floor?" ”

"I don't know about this," the bearded man frowned, "because he didn't speak, and I don't know if he opened it." ”

"Castle, castle!" Gao Mu hurriedly grabbed Gao Cheng and said with a wry smile, "If you ask, you should ask alone, okay?" ”

"That's right," Gao Cheng smiled, "I'm just a little curious. ”

Enough is enough.

If it was a prisoner who opened the door to the lacquer house, he should still be in the living room at the time, and when he was in a hurry to arrange the secret room technique, how could he still let people come.

The prisoner is this bearded man, yes, the question is what kind of secret room technique is used.

It shouldn't be too complicated to come up with a technique that can be come up with and apply in a short period of time......

Gao Cheng looked at the door lock again.

It takes two steps to arrange the secret room, and the door is locked and the anti-theft buckle is hung.

"Yes," said the fat woman when she was questioned alone, "I did meet Mr. Mashiko today, and he also treated me to black tea in the living room, and the time for a song on the record should be about ten minutes." ”

"Records?"

"I was collecting records of classical jazz, and Mr. Mashiko said that he found the record I was looking for, and when I came to pick it up, he put a song on me......"

Sato asked, "Did the doorbell ring during your time?" ”

"This ...... I always listen to music with headphones on......"

"As I said just now, I stood at the door of the entrance and said a few words to him, but I didn't enter the room," said the freckled woman who was the second questioner, "because I haven't made an appointment either, and he seems to be a guest......"

The freckled woman is a former employee of Mr. Mashiko's company, and she was fired for poking a big basket, and this time she came to thank Mr. Mashiko for helping to introduce a new job.

As for the last bearded man, he and Mr. Mashiko were friends in college, and he was a writer who debuted in the same year, and the latter changed careers early without grades, and this time he came because he hit a bottleneck, and he wanted to discuss the idea with Mr. Mashiko, saying that he had often discussed it in the past.

At this time, Gao Cheng left the trip and returned to the scene, with a roll of gift packing ribbons in his hand.

"Joto?" Sato's face was puzzled, "...... are you?"

"I wanted to verify the prisoner's secret room method, so I bought something that disappeared from Mr. Mashiko's house," Gao Cheng explained, "The packaging in the living room is an old gift wrap that was used before, and Mr. Mashiko should have used it directly, and then it was disassembled in the living room, and the problem was that I couldn't find the ribbon for packing it anywhere......"

"Was it taken away by the prisoner?" Sato looked cautiously at the three suspects.

"I guess I didn't take it away," Gao Cheng cut a long ribbon with scissors, "but the ribbon is indeed the key to the prisoner's secret room technique."

I've been wondering since just now that Mr. Mashiko was entertaining guests in the living room, and how the scene of the crime could be in the bedroom, and I quickly thought about it. ”

Gao Cheng looked at the three-color cat in Ayumi's arms and saw the ribbon meowing.

"Probably when I unpacked it, the ribbon was taken into the bedroom by this cat, the cat likes this brightly colored, thin and long thing like a rope the most, that bedroom should be where it is used to hide treasures, Mr. Mashiko had an accident when he was looking for a cat in the past."

"Is that so?" Conan's brain reacted the fastest, and he understood Gao Cheng's thoughts almost immediately, but his eyelids collapsed immediately after.

When did Joto know so much about cats?

"Just give it a try."

Gao Cheng hung the ribbon in front of the three-color cat, and after shaking it twice, he successfully turned on the switch of the three-color cat, and ran into the bedroom with a meow and grabbed the ribbon.

"Behind the books on the shelves!" Takagi, who caught up with the tricolor cat, was surprised to find the tricolor cat treasure trove inside the bookshelf, and in addition to the streamer just now, there was also a knotted streamer.

"It's ......"

"It's the prop that the prisoner used to lock the door," Gao Cheng followed into the bedroom, "As a sudden crime, the prisoner thought of this method because he saw the cat taking the ribbon away, and locked the door through the ribbon, but it is not without loopholes, under this condition, the fingerprints on the ribbon cannot be processed." ”

"All that's left is locking."

Xiao Ai's eyes shone brightly and looked at Gao Cheng, who reasoned confidently.

Find the results first and then deal with them, and more and more have their own methods......