Conga-rats, team! Good job catching the killer. Er, well, finding them. We still need to catch them! Fortunately, we're pretty sure they're under some sort of spell or something weird like that. When you were going through their secret lair, no one found anything too out of the ordinary, but you did spot this scribbled on a piece of paper:
GSV WFUUOVKFWH HZRW GSV DILMT HKVOO.
What could it possibly mean??? Give it a go and see what you can come up with. Once you can read the code, give me a holler and I'll check inside this nifty book the Magician gave me and see if there is anything in there that will help you out. If you have too much trouble figuring it out, talk to one of the Hosts. They might be able to help you.
(Oh, and as you have already made a correct accusation, the Peacock Alliance will be unable to make another accusation until you've freed MountainFireflower from her spell!)