Heiji explains that in the storage room , Kategawa drugged Tarumi into a drunken slumber and put red paint on Tarumi to imply he was killed .
After a thorough investigation , Heiji reveals the culprit to be Takashi Kategawa , a friend of Tarumi .
Heiji explains that in the storage room , friend drugged Tarumi into a drunken slumber and put red paint on Tarumi to imply Tarumi was killed .
After a thorough investigation , Heiji reveals the culprit to be Takashi Kategawa , a friend of Tarumi .