SDCL § 19-19-407: Subsequent remedial measures.

When measures are taken that would have made an earlier injury or harm less likely to occur, evidence of the subsequent measures is not admissible to prove:

(1) Negligence;

(2) Culpable conduct;

(3) A defect in a product or its design; or

(4) A need for a warning or instruction.

But the court may admit this evidence for another purpose, such as impeachment or--if disputed--proving ownership, control, or the feasibility of precautionary measures.