City of Aurora v. Kepley

This court stated in Mentor v. Giordano (1967), 9 Ohio St. 2d 140, in the sixth paragraph of the syllabus, as follows:

“Before the results of a Breathalyzer test given an accused are admissible in evidence against him, it is incumbent on the state to show that the instrument was in proper working order and that its manipulator had the qualifications to conduct the test.”

In Cincinnati v. Sand (1975), 43 Ohio St. 2d 79, this court explained Giordano, and held that the results of a Breathalyzer test could be admitted in evidence only upon an affirmative showing that the bodily substances were…