The South Dakota Highway Patrol says no alcohol was involved in the deadly crash south of Mitchell two weeks ago.
The crash happened on Highway 37 about six miles south of Mitchell.
The drivers of both vehicles were killed and a two-year-old child was injured.
Authorities say test results revealed that alcohol was not a factor in the crash that occurred when 23-year-old Sara Claggett's minivan crossed the center line and collided with a pick-up driven by 82-year-old Donald Geidel.
The Highway Patrol is still investigating other factors that could have caused the crash.