The Rodeo Murder is the title of the 3rd mystery in the book 3 At Wolfe’s Door, by Rex Stout.
A rodeo comes to town, and the rich guy whom nobody liked and everyone would want dead is strangled during the party. There were 4, or was it 5 possible suspects. The movements and timing of each suspect was crucial to determine who had the opportunity to commit the murder at the specified time. I lost track of who was where. But the ending was satisfactorily explained.