I don’t say that Mr. Bulstrode has been guilty of shameful acts, but I call upon him either publicly to deny and confute the scandalous statements made against him by a man now dead, and who died in his house—the statement that he was for many years engaged in nefarious practices, and that he won his fortune by dishonest procedures—or else to withdraw from positions which could only have been allowed him as a gentleman among gentlemen."
There are no more uses of "nefarious" in the book.
Show samples from other sources
Like his lesser satellites, over the years Tom-Carl had assumed an ill-fitting air of respectability and did not care to be reminded of his nefarious beginnings.
Harper Lee -- Go Set a Watchman
I wondered if I’d become so nefarious come October, I’d be some frat boy’s tasteless Halloween costume: mop of blond hair, an Amazing Amy book tucked under an armpit.