Although Sumika’s attack is looked at, Conan and Masumi are not deterred from their conclusion and proceed with the investigation. They reveal that Sumika killed Hakuya. The pair reveal that Sumika bludgeoned Hakuya with the dumbbell and submerged his body in the bath water, killing him. She covered his corpse with tomatoes that sank to the bottom, then used her fan and a bat to simulate the sounds of a vacuum cleaner.