The difference in being 21 years of age and not old enough to drink was not caught by three area businesses, but the fact that beer was sold to minors was caught by police.
On Friday, 20 different liquor establishments in Winnebago County were tested.
Riverside Food and Liquor, Osco Drug Store on Riverside and Wal-Mart Supercenter on Northridge all allowed undercover underage participants to purchase beer.
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