Why was Crow innocent in the Westing Game?

Berthe Erica Crow was innocent in the Westing Game, because she charged for false murder, being blamed for the death of Samuel W. Westing. Later in the book, Turtle Wexler finds out that Samuel W. Westing was not directly dead as in the sense that the heirs thought. The will of Samuel W. Westing declared that his life was taken by one of the heirs, and that heir was Alexander McSouthers, who was actually Samuel W. Westing. When he became Alexander McSouthers, he stopped becoming Samuel W. Westing, therefore a life was taken. Berthe Erica Crow was therefore, innocent.