“Sinner Man” is an American traditional spiritual song that has been recorded by a number of performers. The song dates to the turn of the 20th century but most modern recorded versions derive from the 1956 recording by Les Baxter, further changes and additions were codified in 1959 by the folk music group the Weavers.
A different version entitled “Downpressor Man” was recorded by Peter Tosh & The Wailers in 1971 (“downpressor” meaning “oppressor” in Rastafarian vocabulary). The song featured Tosh on lead vocals and Bunny Wailer on background.
Sinéad O’Connor covered Peter Tosh’s single on her 2005 album Throw Down Your Arms. You judge her cover:
and here is the original: