"Well..." Florian hesitated but took a deep breath. "Scarlett approached me. She told me how you... interrogated her before the ball. I told you this. However, I found out that you asked her some odd questions, and one of those was, well, if she... wanted to kill you."
Heinz continued to stare at him, which Florian took as a sign to continue. "It... got me thinking. You told me to figure out why Scarlett won instead of the rest, and perhaps it's because she acted the most suspicious. She ran away when she thought she killed you and kept apologizing."
"You've been keeping an eye on the princesses a lot. You have... been ignoring them. You died because of poison, and there were probably only a few people who could go near you at the time... and most of those were the princesses you would summon. So, I had a theory that maybe you suspected that a princess killed you."