CHICAGO (CBS) --A tow truck driver was killed and his 15-year-old son was seriously injured when a heavy-duty tow truck collided with another semi-trailer truck on Christmas Eve in Kankakee County.

Editor's note: This story has been updated to include information from Delaware State Police. Heavy-duty wreckers were used to free a 42-year-old Laurel man after a grain elevator fell on the truck he ...