I first heard this song in The Thomas Crowne Affair; you can watch the clip from the movie that used the song here. A search turned up this link on Nina Simone’s life — she was was an American singer, songwriter, pianist, arranger, and civil rights activist widely associated with jazz music. Here is a link to her official website.
Sinnerman (spelled as one word) is one of Nina Simone’s most famous songs and she recorded her definitive 10-minute-plus version on her 1965 album Pastel Blues. Simone learned the lyrics of this song in her childhood when it was used at revival meetings by her mother, a Methodist minister, to help people confess their sins. In the early days of her career during the early sixties, when she was heavily involved in the Greenwich Village scene, Simone often used the long piece to end her live performances. Listen to her 10-minute version here.
Find the lyrics to Sinnerman here, and more about the song’s history here.