"Miss Meicai didn't commit suicide, but was dragged to the bathroom after being fed sleeping pills. As for the murderer..."

Bai yanzhenyu restrained the smile on his face and slowly told the truth. Then he stretched out his hand to the unnatural looking Qingdao quandai and pointed out: "it's her own sister, miss quandai!"

The expression of Qingdao quandai was obviously surprised, and immediately denied: "don't talk nonsense. How can I kill my sister?"

"Yes, how could the murderer be Miss Quan generation..."

According to the investigation of the neighbors by the police, Qingdao quandai has a very close relationship with Qingdao American food. Therefore, Mumu police department and others also find it difficult to believe Bai Yan Zhenyu's inference.

To Maori Kogoro, who has a good sense of Qingdao's whole generation, he asked excitedly, "Zhenyu, we opened the door together before. This bathroom is a completely closed secret room. How did miss Quan leave the secret room if she was a prisoner?"

"Uncle, what if this is not a secret room?"

Baiyan Zhenyu didn't care about Maori xiaowulang's elbow turning out. He shouted the people out of the bathroom. Then he stood at the edge of the door, stretched out his hand to hold the door handle and said, "uncle, Mumu police department, you can try knocking down the door again."

Mumu police department and Maori xiaowulang seem to understand Bai yanzhenyu's meaning and hit the bathroom door according to Bai yanzhenyu's instructions. However, Bai yanzhenyu obviously felt a lot of resistance because he held the door handle with a little force.

After trying the impact, Maori Kogoro calmed down, frowned and said, "Zhenyu, you mean..."

"Yes, that's what that means. At that time, miss quandai's position was the door handle. If she didn't hit the door with us, but pulled the door handle secretly, it would give us the illusion that tape stuck to the bathroom door."

Baiyan Zhenyu nodded and continued: "as for the glue marks on the door frame, it should be that miss quandai sealed the doors and windows with adhesive tape from the inside after killing miss Meicai, then directly pulled the bathroom door from the inside, and then closed the bathroom door."

"After all, the inside of the door is a dead corner. If you only observe it from the outside, you can't see the real situation at the crack of the door."

Although Bai Yan Zhenyu's statement is a possibility, the Mumu police department still didn't fully believe it and asked, "but there are only miss Meicai's fingerprints on the tape in the bathroom. How can we explain this?"

"This is very simple."

Conan ran from the living room, holding a piece of corrugated cardboard in his hand, helped to explain: "because miss quandai wants to move from here, miss Meicai cuts the tape section by section when she helps pack her luggage, so that it is convenient for miss quandai to paste the gap of the corrugated box. The circle of glue marks on the edge of the table top in the guest room is the evidence."

"Conan is right. Miss quandai used those tapes to decorate the scene." after Bai yanzhenyu cracked the problem in the secret room, he added: "of course, in order to prevent fingerprints from leaving on the tape, it should be used with gloves."

At this time, officer Takagi, who went to the convenience store to investigate, returned to the scene and reported the situation to the Mumu police department.

"Mumu police department, at about 7:30 last night, miss Meicai bought two bottles of detergent, tape and two bottles of bottled beer in the convenience store. The clerk said that miss Meicai was no different from usual, but when she paid, miss Meicai replaced one of the detergents she had previously purchased with another brand."

"So it is."

The situation reported by officer Gaomu made Bai yanzhenyu more convinced of his judgment and sighed: "Miss Quan, at that time, you asked Miss Meicai to go to the convenience store to buy these things, and being replaced by Miss Meicai is a detergent that can react chemically with another bottle of detergent to generate toxic gas, so you will choose to cut your wrists to kill miss Meicai after this method fails."

"Ha ha ha."

As soon as Bai yanzhenyu's voice fell, the whole generation of Qingdao suddenly laughed and said with a sneer: "if I'm suspected as you said, but even if you say more, all this is just your reasoning. What evidence do you have to prove that I'm a murderer?"

"If you want people to know, don't do it unless you don't do it yourself."

Bai yanzhenyu half narrowed his eyes, said a classic proverb left by his ancestors, pointed to the headscarf on the forehead of Qingdao and said, "evidence? Of course, it's on your headscarf."

"What are you talking about?"

When the whole generation of Qingdao heard the speech, they took off the headscarf on their forehead. After watching it carefully, they suddenly turned white and exuded dense sweat on their forehead.

Seeing the response of the whole generation of Qingdao, Bai yanzhenyu smiled and said faintly, "ha ha, it seems that you already know..."

Mu Mu police department didn't understand Bai Yan Zhenyu's meaning and asked directly, "brother Zhenyu, what's the evidence you said?"

Seeing that others were puzzled, Bai yanzhenyu said, "do you see the words printed on Miss Quan's headscarf?"

"See, what's wrong with this [Yoko]?" Mumu police department looked at the headscarf and still didn't quite understand Bai Yan Zhenyu's meaning.

"The words printed on Miss Yoko's new CD gift should be the same as the key ring shown to us by Miss Quan Dai [y] ō Ko], instead of Yoko, which is a little less. "

Baiyan Zhenyu reluctantly turned his eyes and had to explain more bluntly: "the evidence I said is the blood stain on the whole generation of miss Meicai's headscarf. If I guessed correctly, the little thing to go is that it was covered by the blood stain of miss Meicai splashed when cutting her wrist."

After Bai Yan Zhenyu explained the evidence, he turned to Qingdao quandai and asked, "miss quandai, the new CD was only sold yesterday, so you got this headscarf yesterday. Can you explain why it was stained with Miss Meicai's blood?"

It's easy to identify blood. Therefore, when the tide is over, the whole generation of Qingdao will no longer sophistry and frankly say, "hehe, you're right. I didn't expect to expose it. It's actually the blood of American food."

Qingdao quandai explained that she was motivated to kill, that is, her sister, who liked the same things as herself since childhood, robbed her boyfriend Xianer, who had been dating for five years, and asked Xianer to get married.

However, when Xian Er came to the scene later, the truth was not so, but Xian Er chose his sister and took the initiative to ask for marriage.

For the sake of my sister's self-esteem, Qingdao Meicai asked Xianer to say that he was pestering his request. He was afraid that his sister would be hurt when buying detergent, so he deliberately replaced it with the same detergent that would not produce toxic gas.

After learning the truth, the whole generation of Qingdao burst into tears holding his sister's body. Unfortunately, his mistakes can no longer be redeemed.