red - that's just true
purple - people who're saying it believe it's true, but if they've killed at any point within this mystery, they might lie using purple (doesn't mean that they have to lie though)
straight up lies can only appear in purple text (like, if white text says "XXX is dead" then XXX was dead, but if it says "XXX lies down covered in blood" then XXX can be faking their death but they're lying down covered in blood)
detective can't be culprit so they never lie (but can be wrong) - detective in story 2 is Erika and in story 3 it's Battler
in story 2 we only need to submit names of killers but in story 3 we need names and explanation behind each kill ("they" could kill "someone" that because they hid "there" after "someone else" left the room, or something like that)
more or less this