Who wrote 'a sinner's prayer' for Marty Robbins?

"A Sinner's Prayer" was written by the American songwriter and musician, A. P. Carter, but the version popularized by Marty Robbins was adapted by Robbins himself. The song features themes of regret and longing for redemption, typical of Robbins' heartfelt style. It was included on his 1961 album, further solidifying his reputation in Country Music.