South Dakota Codified Laws
Chapter 31 - Correction Of Proceedings
Section 23A-31-3 - Reduction of sentence for substantial assistance in investigating or prosecuting another.

23A-31-3. Reduction of sentence for substantial assistance in investigating or prosecuting another.
Upon the motion of the prosecuting attorney, the court may reduce a sentence if the defendant has provided substantial assistance in investigating or prosecuting another person.
Whenever granting a sentence reduction pursuant to this section, the court is not prohibited from reducing the sentence to a level below the minimum sentence provided in statute.

Source: SL 2009, ch 125, ยง1.