Murder in the Museum

Professor P. U. Plum, the curator of the Calhoon Museum, has been found dead in the museum's Dome Room. You, Inspector Claude la Mort of the Surete, have been assigned the task of investigating the case. You suspect foul play, but can you find out who murdered Plum, and why? Watch out, though; the murderer might just get you before you get him (or her)!