What does Poe refer to when he said, "...a crime of dark dye (having reference to the "young lady") has been committed..." ?

In
"", the Reverend Mr. Hooper begins to wear a black veil that obscures most of his
face, suprising and confusing his congregation. It is strongly suggested that Hooper is wearing
the veil because of a woman who has recently died; at her funeral, the following
transpires,

The clergyman stepped into the room where the
corpse was laid, and bent over the coffin, to take a last farewell of his deceased parishioner.
As he stooped, the veil hung straight down from his forehead, so that, if her eyelids had not
been closed forever, the dead maiden might have seen his face. Could Mr. Hooper be fearful of
her glance, that he so hastily...