Hello! I'm Crazy Cakes but you can call me Crazy! Here's a little riddle I'd like you to solve.

There was a King and a Queen who lived in a circular palace. One day, the Queen was murdered. So the king went to the royal butcher and asked "Did you kill the Queen?" The butcher replied "No, I was here cutting meat." Then the king went to the royal tailor "Did you kill the Queen?" "No, I was here working on the Queen's funeral gown." And so the king went to the maid. "Did you kill the Queen?" the king asked once more "No, I was busy sweeping up the corners." Who killed the Queen? PM me your answer.