The bathroom of the new doctor's house has a very simple internal layout. On the left side of the door is the washstand for morning and evening dressing, and on the right side is the large bathtub that has just had an accident.

According to the examination of the corpse, the new doctor was indeed electrocuted, so the key evidence is the electric razor with extension cord installed.

After Bai yanzhenyu went over and observed carefully, he suddenly found an abnormality, that is, the switch of the electric razor was turned off.

In this way, there is a new doubt. If the new doctor gets an electric shock when using the electric razor, the switch should be on. That is to say, the new doctor probably did not use the electric razor at that time.

Conan, who was also looking for clues, seemed to have found something. Suddenly, he shouted "wow", which scared officer Takagi to slip under his feet and fell heavily in the bathtub.

"Conan, why are you making trouble again."

Seeing this, Xiao Lan quickly ran over and grabbed Conan, apologized to officer Takagi and said, "sorry, officer Takagi, Conan is naughty again."

"It doesn't matter, it doesn't matter..." officer Takagi waved his hand and rubbed his head. He didn't care about Conan.

Maori Kogoro didn't want officer Takagi to be so talkative. He grabbed Conan's back collar and scolded, "what are you yelling about there, you smelly kid?"

Conan pretended to be pathetic and explained, "because my mind is going to explode..."

"Dad," Xiaolan looked at Maori xiaowulang discontentedly, quickly rescued Conan from his hands, and asked with concern, "Conan, what's wrong with you?"

"It's not physical discomfort."

Conan pretended to be naive, blinked, stretched out his hand and pointed to the bathtub, reminding: "you see, the dead new doctor was standing there shaving, so it should be like officer Takagi just now. His head fell in this direction, but the new doctor's head was in the opposite direction. How could this happen?"

"That's what I said..."

After hearing Conan's reminder, Mu Mu police department frowned and muttered, "can we say that this case is not what we think of as an accident?"

"Hum, isn't it simple?"

Maori xiaowulang snorted coldly, took off his shoes and socks and walked into the bathtub. While demonstrating, he explained confidently: "when the new doctor shaved, he suddenly noticed that the extension line was about to fall into the bathtub, so he hurriedly turned around. Unexpectedly, he pulled the extension line into the bathtub and got an electric shock."

Maori Kogoro's explanation is possible, but Bai Yan Zhenyu shook his head, pointed to the electric razor Maori Kogoro took to demonstrate, and reminded: "uncle, the switch of the electric razor is off."

"Closed?" Mao xiaowulang noticed this detail and touched his chin to think.

Mumu police department also noticed this and said suspiciously, "it's really strange. If you get an electric shock while shaving, the switch should be in the on position."

Maori xiaowulang still insisted on his "reasoning" and forcibly explained: "well... I think it must be officer Takagi who accidentally turned off the switch when he fell just now, just like this..."

Speaking of this, Maori Kogoro directly pushed the switch. He found that the electric razor turned at high speed and made a 'buzzing' sound, which startled him.

"Eh? Strange, I was worried about danger, so I just pulled out the plug..."

Officer Takagi looked stunned in his eyes, turned to the plug at the other end of the extension cable, and then suddenly realized, "Oh, I see. This is a rechargeable electric razor."

"Then why did it close?"

Mumu police department looked at the electric razor puzzled, and then asked Bai Yan Zhenyu and others, "was it working when you found the body?"

"No, it was closed at that time."

After Bai yanzhenyu answered the question of Mumu police department, he guessed: "I think it may be because of the sound, maybe someone doesn't want others to hear it."

Maori xiaowulang was confused and asked, "Zhenyu, who doesn't want anyone to hear?"

Baiyan Zhenyu hasn't figured out the truth yet. He gently shook his head and explained, "this is just my guess. Maybe someone secretly put the extension line into the water without attracting the attention of the new doctor."

After thinking about it, the Mumu police department retorted, "it should be impossible. If you really want to do this, even if there is no sound, the new doctor can find it?"

Maori Kogoro thought the same as Mumu police department, and then added: "yes, everyone here has an alibi when there is a power failure."

At this time, Conan came up and warned, "the light went out before it came on, and then it came on again."

After hearing Conan's reminder, Mao xiaowulang suddenly realized that there was something wrong and asked the breakeven light who had gone to restart the switch: "Miss breakeven, it seemed that you went to check the switch at that time. Did you move the switch twice at that time?"

Breakeven light didn't expect Maori Kogoro to ask her. He timidly nodded and said apologetically, "yes, because I seemed to have made a mistake at that time, pulled up the other switch, and then pulled up the main switch. I'm really sorry."

The breakeven answer confirmed the speculation in Maori Kogoro's heart. He immediately gathered around the Mumu police department and whispered, "the second one in Mumu police department should be the leakage circuit breaker. Did someone really do something like Zhenyu's guess?"

"Yes."

Mu Mu's police department nodded, looked at several new monks, and said, "use the timer to install a power failure device. During the period of re energization, you can rush to the bathroom first and put them into the bathtub quietly. The four of them are indeed likely to commit murder."

After hearing what the Mumu Police Department said, Mrs. Yoko said discontentedly, "Hello, Mr. policeman, what do you mean?"

"Er... No," the Mumu police department quickly waved and explained, "I just want to confirm your alibi before and after the power failure."

Xinchu Zhiming looked at the Mu police department angrily and said impatiently, "didn't the alibi just say it?"

The old woman snorted coldly and asked discontentedly, "what's the matter? Do you mean one of us is a murderer?"

"Ah, this..."

When Mu Mu police department was embarrassed and didn't know how to answer, Bai Yan Zhenyu stepped forward and said in a deep voice, "yes, this is a murder. The murderer is indeed one of you."