A Clown Finally Spoke on American Horror Story! Here's Who It Could Be

Under that clown mask could obviously be this season's apparent villain. Kai seems to be the ringleader for the rest of the clown squad, so it's likely that he was there in the house that night. That being said, his voice is a little more agitated and nasally than that of the clown. Kai might also just be too much of an obvious choice.