Rochester, MN (KROC-AM News)- The Olmsted County Sheriff’s Office is investigating an apparent fight and mace spraying at the Olmsted County Fair Wednesday night. Get our free mobile appSheriff’s Captain Tim Parkin said the incident was reported shortly after 10 p.m. At one point an adult female involved in the altercation deployed a canister of what was described as mace or bear spray causing the crowd to disperse. Olmsted County Fair File photo. Olmsted County Sheriff's Office photo Olmsted County Sheriff's Office photo loading...Parkin said some of the musical act’s crew members complained of the smell from the lingering spray, which is estimated to have clung to the air for about 30 minutes.