Ep. 10: Sakon uncovers the left-handed killer Aoki through voice mimicry and a past fire connection.

10

Sakon analyzes evidence to conclude that a left-handed individual committed the murders, despite all present suspects being right-handed. He identifies Aoki, an assistant with a head bandaged from a past fire, as the left-handed culprit. By using Ukon to imitate the voices of the deceased, Sakon tricks Aoki into confessing. The narrative reveals that Aoki is the ex-husband of Keiko, Hayami’s partner. His motive stems from revenge for the death of their daughter years ago during a fire that disfigured him while he attempted to save her. This backstory explains his hidden identity and his connection to the victims, resolving the mystery through psychological manipulation and revealed history.