S.D. Codified Laws § 1-15-23
The secretary of corrections may inquire into and examine the condition of the institutions under the department's control, financially or otherwise; inquire and examine into their methods of instruction and government and management of their inmates, the official conduct of all officers and employees of the same, the condition of the buildings, grounds, and other property connected therewith, and into all other matters pertaining to their usefulness and good management. For these purposes the secretary shall have free access to the grounds, buildings, and all books and papers relating to such institutions, and all persons in any manner connected with the same shall give such information and afford such facilities for inspection as the secretary may require, and any neglect or refusal on the part of any officer, employee, or person connected with such institutions to comply with the requirements of this section shall be sufficient cause for his removal. The secretary may administer oaths and examine any person in relation to any matter connected with the inquiries authorized by this chapter.
SDCL 1-15-23