One of Ohio's 12 judicial districts has taken notice, also based on a case without a defense expert. Greenberg says he's appeared against laser seven times, defeating it each time. The national scoreboard shows that Maryland's highest appeals court has approved the general admissibility of laser evidence, but it did not rule on the accuracy and reliability of any specific laser device, leaving that question open. A circuit court in Little Rock has recently taken notice of the LTI 20-20, a decision that amounts to a moderately influential precedent in that state. Again, it was a trial with no expert witness for the defense.
Prosecutors have the upper hand.
If they see that you're really prepared, they can jerk you around. That's what happened to Luke Ball, an NMA coordinator in Texas. After he appeared nine different times in two different courts over an 18-month span, the prosecution finally dropped the speeding charge against him. Not on its merit. There will be enough cases that are poorly defended.