In 1806 an anxious crowd of thousands descended upon Lenox, Massachusetts, for the public hanging of Ephraim Wheeler, condemned for the rape of his thirteen-year-old daughter, Betsy. Not all witnesses believed justice had triumphed. The death penalty had become controversial; no one had been executed for rape in Massachusetts in more than a quarter century. Wheeler maintained his innocence. Over one hundred local citizens petitioned for his pardon--including, most remarkably, Betsy and her mother.

Impoverished, illiterate, a failed farmer who married into a mixed-race family and...