A carnival worker accused of stabbing a man on the Cheyenne Frontier Days midway in July has pleaded not guilty to aggravated assault.

Twenty-two-year-old Matthew Vicencio entered the plea during his arraignment Monday in Laramie County District Court.

Police say Vicencio stabbed 18-year-old Josiah Richardson in the back after the two Cheyenne men got into a fight over the basketball shooting game Vicencio was running.

Vicencio remains jailed on a $10,000 cash bond. His trial is scheduled for November 7.