I have read Indonesian version of DC chapter 951. Conan think he is the first person who ate the drug. He can't say Rum gender unless he can confirm that Asaka is not family name. Kogoro is invited to meet a detective who can talk to the dead. And this detective is going to talk to the late Haneda Koji. So Conan tag along with Kogoro. Once they arrived the detective is found dead and the suspect seems like running to the adjacent room. Sera rent that room and she lied that she is alone.