Louise Vermilya (née Woolf; July 1868 – December 1913) was an American "black widow" whose activities spanned the turn of the 20th century. Light was shed on her murders only after she resorted to murdering outside of her immediate family, beginning with the death of policeman Arthur Bissonette. Authorities were alerted and suspicion arose over the peculiar and similar fates experienced by her two husbands, several immediate family members and two associates known to her.