The first in a group of suspects charged with attacking a Cincinnati police officer in a July 4 Fountain Square melee pleaded guilty Monday.
Hamilton County Common Pleas Court Judge Megan Shanahan convicted Jy Quynn Britten, 21, of aggravated riot and assault on a police officer.
In exchange for Britten's plea, prosecutors dropped two charges against him: a second count of aggravated riot and inducing panic.
Britten will be sentenced Sept. 29.
In all, eight people were indicted in the attacks that drew Cincinnati police in riot gear to Fountain Square.
The unrest started as a concert at the square ended about 11 p.m. Only eight officers were patrolling the area when people began hurling bottles and fireworks at police.
Officer Roger Noe and Officer Joe Simpson were struck in the face.
Cincinnati Mayor John Cranley called the incident an "event-based problem" and said more officers should have been patrolling the area. As a result, the remaining Saturday night concert series on Fountain Square were canceled.