State v. Helke, 46 N.E.3d 188

Michael Helke was charged in Kettering Municipal Court with driving 83 mph in a 55 mph zone; bench trial resulted in conviction and $150 fine (half suspended).
Trooper Jerod Keyes testified he visually estimated the vehicle at 80–85 mph and then clocked it at 83 mph using a hand‑held laser (referred to as an Ultra Light LiDAR/Ultralyte-type device).
Keyes described his academy training (40 hours) and periodic supervisory ride‑alongs but did not produce written certification or device maintenance/calibration logs at trial.
Helke objected that the State failed to establish the laser device’s scientific reliability and that the court improperly took judicial notice of reliability without proper foundation.
The trial court overruled objections and relied on Keyes’s testimony; on appeal the court examined whether judicial notice or other authorized methods established the laser’s reliability.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether officer's unaided visual speed estimate alone can support conviction	Keyes was trained and experienced; visual estimate corroborated by laser	Visual estimate alone insufficient under amended R.C. 4511.091	Visual estimate alone insufficient for conviction under statute; cannot be sole basis (Barberton limited by statute)
Whether laser reading was properly admitted without expert testimony or device‑specific judicial notice	Laser is a common speed‑measuring tool; officer testified about training and use	State failed to identify specific laser model, show prior judicial notice or admissible foundation for that model's reliability	Court found State failed to establish device reliability by authorized methods; admission insufficient to sustain conviction
Whether trial court properly took judicial notice of laser's scientific reliability	Trial court had discretion to rely on prior knowledge/notice	Helke objected that court had no prior finding or report establishing that specific device's reliability	Court held judicial notice was not properly taken for the Ultra Light/unnamed model in this district; judicial‑notice foundation lacking
Sufficiency of the evidence to convict	Laser reading plus officer's testimony proved speed beyond reasonable doubt	Evidence insufficient because device reliability and identification not established	Evidence insufficient to prove speeding beyond a reasonable doubt; conviction reversed

Barberton v. Jenney, 126 Ohio St.3d 5 (Ohio 2010) (officer's unaided visual speed estimate can suffice when officer is trained and certified, but later statutory amendment limits reliance on unaided estimates)
City of E. Cleveland v. Ferell, 168 Ohio St. 298 (Ohio 1959) (Supreme Court recognized judicial notice of scientific accuracy of stationary radar speedmeters)
State v. Jenks, 61 Ohio St.3d 259 (Ohio 1991) (standard for reviewing sufficiency of the evidence in criminal cases)