Hint 5: Keep searching for confirmed deaths

[prof]

People whose deaths were confirmed by those two are definitely dead. And that means they can't be the culprit.
Which in turn increases the number of purple statements we can trust!
Let's start with Doctor Nanjo. He confirmed the deaths of the victims in the second twilight, Krauss and Natsuhi.
Then, on the fourth twilight, he also confirmed Shannon's death.
On the fifth and sixth twilights, he even confirmed Gohda and Kumasawa's deaths.
The number of innocent people has skyrocketed! In addition to Nanjo and Jessica, we now know that Krauss, Natsuhi, Shannon, Gohda, and Kumasawa cannot be the culprit!
That's not all. On the fourth twilight, Bernkastel announced Kanon's death with the red truth. The culprit can't die, so Kanon isn't the culprit either!
Nanjo, Jessica, Krauss, Natsuhi, Shannon, Kanon, Gohda, and Kumasawa. All eight of them are not the culprit!
Ooohh... All of a sudden, they now have eight suspects less.
It's only natural that they'd make it this far. This is where it really begins.
Now, the number of purple statements we can trust has grown tremendously. We're really getting into the thick of it...!
Yeah! Let's check through the purple statements of the characters we've just proven innocent!