Background
Source: Wikipedia
Helen McCloy (6 June 1904 – 1 December 1994), pseudonym Helen Clarkson, was an American mystery writer, whose series character Dr. Basil Willing debuted in Dance of Death (1938). Willing believes, that "every criminal leaves psychic fingerprints, and he can't wear gloves to hide them." He appeared in 13 of McCloy's novels and in several of her short stories.