The willful and wanton supervision claims Becky Andrews pursued as Jeffrey Andrews’ plenary guardian against the Metropolitan Water Reclamation District of Greater Chicago didn’t allege anyone had previously been injured by the hazardous condition — a treacherous cross-over between two ladders — that allegedly caused Jeffrey’s head injuries from a 29-foot fall to the bottom of a concrete chamber.Jeffrey was working as a cement finisher for a joint venture the district hired for a construction …