City of Sioux Falls v. Kohler

Lt. Renli in answer to a question that this was an on-the-spot test and did not purport to be a scientific portion, testified it was what they called only a "field test," to distinguish between a person who had "nothing *38to drink" and a person who had "something to drink." This is of the same tenor as the printed item on Ex. 3 headed "Some Key Points" which states as to the interpretation of Decolorization Time: "Remember this gives an approximate % only. The chemist will determine the exact % for evidence." (Emphasis supplied)

It was an early step only to determine if there was alcohol present…