SDCL § 22-30-3: Fear of force necessary to robbery.

The fear of force which constitutes an element of the offense of robbery may be either:

(1) The fear of an injury, immediate or future, to the person or property of the person robbed, or of any relative or family member of the person robbed; or

(2) The fear of an immediate injury to the person or property of anyone in the company of the person robbed at the time of the robbery.