SDCL § 12-26-23: Tampering with ballots, ballot box, or poll list as felony.

A person who intentionally breaks, destroys, steals, or conceals any ballot box or any poll list used or intended to be used at any election, or who, before the ballots have been counted or canvassed, or during the time within which a contest or recount may be instituted or is pending and undisposed of, shall intentionally deface, change, injure, destroy, steal, or conceal any ballot or ballots which have been voted and deposited in any ballot box at an election, is guilty of a Class 6 felony.