OSHKOSH, Wis. — The driver of a semi that crashed into a house and killed an infant boy had fainted due to a medical condition prior to the crash, said Winnebago County Sheriff John Matz. The driver, whom Matz identified only as a 63-year-old Little Chute man, was heading south toward Oshkosh on Interstate 41 when he fainted and traveled into the west ditch. The semi continued through a safety fence and onto Green Valley Road. The truck crossed the road and hit a home in at 5833 Green Valley Road. Neither alcohol nor drugs were involved, the sheriff said.