A woman was decapitated after an "intoxicated" boater allegedly drove around 80 miles per hour on a river in Illinois and catapulted over another vessel, authorities told ABC News. "The defendant, while intoxicated, drove his vessel at about 80 mph in a no-wake zone. Court documents indicate that the boat Stevenson allegedly was operating overtook another vessel before he crashed into the timber on the west bank of the river, ABC News added. Stevenson allegedly told a witness after the accident that he was operating the vessel and that he had been drinking, according to court documents. Stevenson is scheduled to appear in court on Aug. 5, the news network said, citing court records.