SDCL § 37-5B-38: Immunity.

No person is excused from attending and testifying or from producing any document or record before the director, in obedience to a subpoena of the director or any person designated by the director in any proceeding instituted by the director, on the grounds that the testimony or evidence required of the director may tend to incriminate the person or subject the person to a penalty or forfeiture. No person may be prosecuted or subjected to any penalty or forfeiture on account of any transaction, matter, or thing concerning which the person is compelled, after claiming the privilege against self-incrimination, to testify or produce evidence. However, the person testifying is not exempt from prosecution and punishment for perjury or contempt committed in testifying.