Certain death, who wants a ringside seat

Recently room 14 has started reading a new book. It is Certain death, Who Wants A Ringside Seat, written by Tanya Landman. This book is part of a series about to 12-year-old kids that always seem to get caught up in murder. Our class has written some theories. Some crazy and some quite cool.
I hope you enjoy my theory. 🎔 

It has to be Alonzo. He hired someone to kill a random victim in the audience, to make it look like an accident. Then when he was alone with Carlotta, Alonzo said something to Carlotta to make her angry and when Carlotta ran out with a kitchen knife, with Alonzo running behind it made it look like Carlotta was guilty and Alonzo was innocent. I think Alonzo is the murderer, and he will try to frame everyone for what he did.