A state investigation into whether gas stations cheat customers by substituting ethanol-blend gasoline for higher-priced regular gasoline yielded its first criminal charges Tuesday.

Attorney General Jon Bruning has filed charges against a gas station owner and distributor he says were involved in a scam to sell ethanol-blend gasoline at higher unleaded prices.

Attorney General Jon Bruning filed charges Tuesday against a gas station owner and distributor he says were involved in a scam to sell ethanol-blend gasoline at higher unleaded prices.