Any person who, either unlawfully removes another person from the other's place of residence or employment, or who unlawfully removes another person a substantial distance from the vicinity where the other was at the commencement of the removal, or who unlawfully confines another person for a substantial period of time, with any of the following purposes:
is guilty of kidnapping in the first degree. Kidnapping in the first degree is a Class C felony, unless the person has inflicted serious bodily injury on the victim, in which case it is aggravated kidnapping in the first degree and is a Class B felony.
SDCL 22-19-1