Rumi used a cell phone recording trick to manipulate the timeline of the murder. By filming vertically, she was able to hide specific movements while playing a recorded keyboard track to make it seem as though Hagie was still alive and sleeping during the rehearsal.
Amuro (Rei Furuya) inwardly reflects on Scotch’s death, maintaining his bitter belief that Shuichi Akai was the one who killed him—a core conflict that drives much of their rivalry in the series. The Unfriendly Girls Band ~ Part 2 - Detective Conan Wiki Detective Conan Episode 837
It is confirmed that the friend was Scotch , a member of the Tokyo Metropolitan Police Public Security Bureau who infiltrated the Black Organization alongside Amuro. Rumi used a cell phone recording trick to
Beyond the immediate case, this episode is a "manga-canon" entry crucial for its character reveals: The Unfriendly Girls Band ~ Part 2 -
The episode follows the investigation into the death of , a female drummer found strangled in a rehearsal studio.
The murderer is revealed to be Rumi , one of the band members.