Beyond the immediate case, this episode is a "manga-canon" entry crucial for its character reveals:
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. Detective Conan Episode 837
The murderer is revealed to be Rumi , one of the band members. Beyond the immediate case, this episode is a