S.D. Codified Laws § 23A-3-24
For the purposes of § 23A-3-25, the term, federal law enforcement officer, means any officer or employee of the Federal Bureau of Investigation, the Drug Enforcement Administration, the United States Marshall Service, the Internal Revenue Service, the Secret Service, the Bureau of Alcohol, Tobacco, and Firearms, the United States Postal Inspection Service, the Federal Protective Service, the United States Fish and Wildlife Service, the United States Forest Service, the Immigration and Customs Enforcement Office of Investigations, or the National Park Service, who is responsible for the prevention or detection of crimes or for the enforcement of the United States Code and who is authorized to arrest, with or without a warrant, any person for a violation of the United States Code.
SDCL 23A-3-24