Q: On the possibility of murder in a secret room Detective Ke Xue: 1. Use fishing line, tape, video tape, etc. to arrange the secret room. 2. Use traps, poisons, poisonous insects, etc. to complete the murder in the secret room. 3. Hide in the secret room after killing. .. . Ke Xue Investigator: 1. Use mythical creatures to complete the murder. 2. Use voodoo spells to complete the murder. ... This book is also known as 'A Certain Unexpected Investigator' and 'About Me Becoming a Legend in the Ke Xue World' 'Investigator thing', 'As a Hawaiian, I have mastered hundreds of millions of skills, this is reasonable', 'At the same time, as a secret master, I know some secrets, this is normal' Ps: The subject is still Conan Doujin