S.D. Codified Laws § 19-5-3 (2026)
A witness shall not be liable to be sued in a county in which he does not reside, by being served with a summons in such county while going, returning, or attending in obedience to a subpoena.
Source: CCivP 1877, § 460; CL 1887, § 5274; RCCivP 1903, § 500; RC 1919, § 2747; SDC 1939 & Supp 1960, § 36.0404.