Minerva gave a weak smile, how did she not hear someone give the answer before she had said it. Well that was just not right of her. Trying to think about the list again and seeing if she could remember anyone else, Min heard him ask another question. That was a great question though, how could we be certain.

"Professor, witnesses to the events are the best source of information, but even then in their state of shock or dismay they might get some fact wrong. For instance most of us were in class when the Astronomy professor was taken, some of us knew what plant it was right away from seeing it before hand, others had no clue. In that state of shock some said she died right there, while others knew and saw her being carried away alive." Still sitting straight and taking a little pause, "So research of the situations and finding out specific details can help us really find the answer of where and how they died." She would have went into more of the muggle way of doing it, but figured the investigation part might be different for wizards.