LENAWEE Co., Mich. (WTVG) – A one-year-old was killed Friday morning in Lenawee County after being hit by a semi-truck. According to a press release from the Lenawee County Sheriff’s Office, a semi-truck and grain trailer driven by a 63-year-old man was backing up in a driveway. While it was backing up a one-year-old ran behind it and was run over.