Lucius gave the woman a hard look and answered calmly: "It is the fact that in during the school year 1942/43 a student has been unfairly and illegally expelled without the approval of the board of governors and the injustice hasn't been fixed during the current headmaster. Since Armando Dippet is dead, the responsibility falls on us and headmaster Dumbledore, since he was back then the deputy headmaster and could have stopped the expulsion with his position, to fix this issue."