State v. Homan, 89 Ohio St.3d 421, R.C. 4511.19(D)(4), and State v. Schmitt, 101 Ohio St.3d 79 piece together when the state can introduce evidence (through testimony and video) concerning the results of standardized field sobriety tests (SFST’s) in any criminal prosecution for OVI. Simply stated, the standard for consideration of the results on the issue of probable cause for arrest or admissibility of the results at trial is “substantial compliance.” Specifically, the state must show by clear and convincing evidence that the officer administered the test(s) in substantial compliance with the testing standards (contained in NHTSA’s DWI Detection and Standardized Field Sobriety Testing Manual) for any reliable, credible, and generally accepted field sobriety tests (the HGN, Walk And Turn and One Leg Stand) that were in effect at the time the tests were administered (currently, the Manual revised in February, 2018). As it relates to trial, upon such a showing the officer may testify concerning the results, and the prosecutor may introduce the results as evidence if the testimony or evidence is otherwise admissible under the Rules of Evidence. If the court admits the testimony or evidence the trier of fact shall give it whatever weight it considers to be appropriate (and a jury instruction should be given which informs the jurors that they determine the weight, and does not invade the province of the jury to be the sole fact finder). Continue reading →