However, without evidence, this is just theory. Shinichi, holding the key ring that had been ignored before, said, "Yes, Mrs. Tsujimura Kimie did not make any obvious move to take out the poison needle, because Mrs. Tsujimura Kimie's key ring is designed the same as the victim's. So, Mrs. Tsujimura Kimie, show everyone your key!"

Kimie Tsujimura remained silent, allowing Inspector Megure to take a key ring from his bag. Just as Shinichi had predicted, the key ring could be opened, and it had a slot. Shinichi nodded and said, "Yes, that's the slot for the poison needle. She took out a key ring containing a poison needle after entering the study. This key ring is the strongest and most irrefutable evidence that Mrs. Kimie Tsujimura is the murderer!"

Inspector Megure couldn't understand why Kimie Tsujimura would kill her husband. Then Shinichi picked up a photo frame from the bookshelf, pointed to the picture, and said, "The answer is in the photo. Don't you think that Mrs. Kimie Tsujimura looked a bit like someone when she was young?"

Everyone crowded around to take a look, their faces filled with shock as they turned to look at Katsuragi Sachiko. Ran exclaimed in surprise, "Except for the hair color, she looks just like Miss Sachiko!"

"Of course it's like that, because I am Sachiko's mother!"

Upon hearing this, everyone, including Sachiko, couldn't hide their surprise, especially Sachiko and Tsujimura Takayoshi. Tsujimura Takayoshi felt like a million alpacas were stampeding through his mind: My girlfriend is actually my sister! How is that possible!

Of course, if it were Kōyū here, he would definitely have a lewd smile on his face, thinking: How exciting!

Kimie Tsujimura recalled, "Sachiko is the child I had with my ex-husband. She was forced by my current husband, Akira Tsujimura, to be accused of dereliction of duty and then dragged down from society—the biological daughter of Kenji Yamashiro, a diplomat!"