Mobile Toilet in Detective Conan
The case related to the mobile toilet in Detective Conan appears in TV episodes 744 - 745 (overseas split version episodes 797 - 798) titled 'The Suspect is Kyogoku Makoto'.
Basic Case Information
In this case, there was a bizarre scene where a burly man drowned in a mobile toilet under mysterious circumstances. Normally, drowning requires a large amount of water, but there was no obvious water source at the scene. This contradiction became a key mystery of the case, attracting the attention of Conan and others, who then launched an investigation.
The Criminal's Modus Operandi
The criminal cleverly used the principle of the 'candle absorbing water' experiment to commit the crime. First, the criminal blocked the drain outside the toilet so that when it rained, the rainwater could not drain normally and would form standing water around the toilet and gradually rise. Then, the criminal used a stun gun to knock the victim unconscious and placed the unconscious victim inside the mobile toilet. After that, the criminal placed burning kerosene on the storage shelf on the upper side of the toilet, quickly closed the toilet door, and sealed the gaps in the door with tape, but deliberately left a gap at the bottom.
Drowning Due to the Principle
As the kerosene continued to burn, it consumed the oxygen in the air inside the toilet, causing the air pressure inside the toilet to gradually decrease. Outside the toilet, due to the blocked drain and the rising standing water, the external air pressure was relatively high. Under the action of this air pressure difference, the external water poured into the toilet through the gap left at the bottom. When the kerosene lamp finally went out, enough water had accumulated inside the toilet, ultimately causing the unconscious victim inside the toilet to drown. This well-designed modus operandi, which utilized physical principles, created a seemingly impossible crime scene and posed a great challenge to the case's solution, but it was ultimately seen through by the clever Conan.
