D&C 42

 Concerning transgression and confession, the Lord instructs - 

"...if he or she confess not thou shalt deliver him or her up unto the church, not to the members, but to the elders. And it shall be done in a meeting, and that not before the world.

90 And if thy brother or sister offend many, he or she shall be chastened before many.

91 And if any one offend openly, he or she shall be rebuked openly, that he or she may be ashamed. And if he or she confess not, he or she shall be delivered up unto the law of God.

92 If any shall offend in secret, he or she shall be rebuked in secret, that he or she may have opportunity to confess in secret to him or her whom he or she has offended, and to God, that the church may not speak reproachfully of him or her."  (Doctrine and Covenants 42:89–92)