'Tis possible Yoite was the one, in fact, who acquired the cough drops. Perhaps he witnessed the beginnings of the murder, and, in an attempt to throw off any potential suspicion, placed the cough drops in the boy's pockets. There is also the possibility of Yoite being an accessory to the murder; we cannot discount this, as any accomplices are placed in the pool of suspects, however serendipitous or unwilling they may have been. Yoite's participation could explain Hanyuu's self-professed lack of strength, as well, but his presence does not align well with the nature of the footprints.