SDCL § 23A-3-4: Advice as to authority and cause of arrest without warrant.

When arresting a person without a warrant, the person making the arrest must inform the person to be arrested of his authority and the cause of the arrest, and require him to submit, except when the person to be arrested is engaged in the actual commission of an offense or when he is arrested on pursuit immediately after its commission.

Source: SDC 1939 & Supp 1960, §§ 34.1608, 34.1609; SDCL, §§ 23-22-9, 23-22-15; SL 1978, ch 178, § 17.