Phoenix says "You can not talk to anyone INVOLVED about the case"

This isn't a limitation, it's a fact.

Who's related:
Vera - afraid to talk, physically unable to mention Kristoph
Drew - dead
Kristoph - Incarcerated
Zak Gramarye - legally dead, actually dead
Valant - can't talk about it without perjuring himself, and you don't even talk to him as apollo because HE FUCKING TURNS HIMSELF IN AFTER THE FACT SO HE'S INCARC'D SO APOLLO CAN'T TALK TO HIM EITHER
Grandpamyre - ded



Brushel - Not technically involved. Literally only there by chance.