The trial of a suburban Chicago man accused of a mass shooting at a 2022 Independence Day parade that killed seven people and wounded dozens more is set to begin Monday.

Robert E. "Bobby" Crimo III, pleaded guilty Monday at the start of the trial accusing him of carrying out a deadly mass shooting in Illinois on July 4, 2022.

An Illinois man has pleaded guilty to a deadly shooting at a 2022 Independence Day parade in a Chicago suburb that killed seven and injured dozens. It is a surprise reversal for Robert Crimo III, who previously pleaded not guilty to first degree murder and attempted murder charges.