LogFAQs > #933542970

From these characters, I can conclude that:
-The dining hall was indeed a closed room.
-No one hid in the dining hall (but they can still play dead)
-Genji's master key was destroyed
-Genji was indeed dead, as confirmed by Genji
-'each child confirmed their parents died' isn't a lie by Shannon. What it means, though, is still vague.
-None of the servants could have committed the crime in the second twilight.
-Natsuhi's room was indeed a closed room.
-The mansion was sealed, and it was never broken.
-No one had an alibi for the fourth twilight
-Shannon's master key was destroyed

Add Genji to the list of non-culprits.