The State offered our client diversion. He turned it down, we sent the prosecutor the science instead of arguing it in a courtroom, and the charge was dropped in full.
In July 2026, the State Attorney’s Office for the Sixth Judicial Circuit filed a nolle prosequi in a Pinellas County cannabis DUI case, which means the charge was dismissed outright. Our client walked away with no conviction, no probation, and no plea to anything.
What makes this one worth writing about is not the result by itself. It is the decision that came before it, and the reason the science supported taking that risk.
The offer on the table
Our client was charged with driving under the influence of drugs under Florida Statute 316.193(1)(a), a first-degree misdemeanor. The traffic stop itself was for speeding, and we want to be clear that the stop was valid. This was never a case about an officer pulling someone over without a reason.
The State offered the DROP diversion program. Completing it would have closed the file as a reckless driving with a period of probation. For many folks facing a DUI, that is a genuinely good outcome, and we recommend diversion to clients regularly when it fits. Turning down a certain, favorable resolution to chase a full dismissal is uncommon, and it carries real risk. If the gamble fails, you can end up worse off than the deal you refused.
We recommended declining anyway, because of what the file actually contained. Our client made the hard call, and he deserves the credit for it.
What the State’s evidence really showed
Strip the case down to the evidence and the picture gets thin quickly.
Our client blew two breath samples, and both registered 0.000. There was no alcohol in his system at all.
The horizontal gaze nystagmus examination, the eye test officers use at roadside, was completely negative in both eyes. That matters more than it might sound, and we will come back to it.
No Drug Recognition Expert evaluation was ever performed. Nobody with specialized drug-impairment training ever examined him.
That left exactly one positive finding in the entire case: a urine test that qualitatively confirmed the presence of carboxy THC. Qualitatively means the lab reported that the compound was present without attaching any number to it.
The State’s entire theory of impairment rested on that single result.
Why a cannabis urine test does not prove impairment
Carboxy THC, formally 11-nor-9-carboxy-THC, is the inactive metabolite of cannabis. It is what is left over after the body has already broken down the active compound. It has no psychoactive effect, and it cannot cause impairment. That is not a defense talking point invented for this case. The drug-evaluation training materials that law enforcement itself uses say that no impairment can be linked to this metabolite, and the toxicology literature describes it as apparently without activity.
Carboxy THC also lingers. It can show up in urine for days after a single use, and for weeks in someone who uses regularly. A positive urine screen therefore establishes that a person used cannabis at some point. It says nothing about whether they were impaired behind the wheel. This is the distinction between presence and impairment, and it decides most drug DUI cases.
There is a further problem, and this one came from the State’s own laboratory. The lab’s report stated that there is no correlation between urine concentrations and blood concentrations. That is precisely why the lab does not put a number on a urine result in the first place. The State’s own scientists were telling anyone who read the appendix that the test could not carry the weight the case was putting on it.
Our client is a registered Florida medical-cannabis patient with a valid physician certification, and he told the officer he had last used his medicine the night before, then drove the following afternoon. The impairment window for inhaled cannabis is short, on the order of a few hours. Using at night and driving the next day falls well outside it.
The eye test that quietly helped
Cannabis does not cause nystagmus. The research literature is consistent on this point, so a negative HGN examination is exactly what the science predicts in a cannabis case.
The useful part is what a negative HGN rules out. Alcohol and certain depressants and inhalants do produce nystagmus. When the eye test is clean and both breath samples read 0.000, there is no indication of any substance in the categories that would have produced those signs. The one test in the case that pointed toward impairment was the test least capable of showing it.
The balance exercises, and a protocol problem
Before the field sobriety exercises began, our client told the officer about a back and shoulder injury. The officer administered the walk-and-turn and the one-leg-stand anyway, without modification, and the results were then scored as evidence of impairment.
We are describing a departure from protocol here, not accusing anyone of bad faith. NHTSA training instructs officers to account for physical conditions affecting the back, the legs, and the inner ear before administering and scoring the balance exercises, for the obvious reason that an injured person may produce the same clues as an impaired one. A disclosed back and shoulder injury is exactly the kind of condition that training contemplates.
There is a deeper issue underneath it. The standardized field sobriety exercises were designed and validated to detect alcohol impairment. They were not built for cannabis. In one controlled study, drivers who had genuinely received THC were not reliably identified by the standard field sobriety battery at all, and the National Institute of Justice has said plainly that field sobriety tests and THC levels are unreliable indicators of marijuana intoxication.
The strategy: a packet, not a motion
Here is the part we think is worth borrowing.
The conventional move would have been to file a motion in limine and argue the science to a judge. Instead, we assembled a written packet and sent it directly to the prosecutor. Part one was biographical mitigation, the human context of who our client is. Part two was the forensic and legal analysis, written as a candid preview of the motion we would file, with an appendix of authorities behind it and pinpoint citations to the treatises and the peer-reviewed literature.
The whole thing was addressed to a working prosecutor with a caseload, not to a judge.
That framing does real work. A motion asks someone to rule against a colleague in open court, on the record, with an audience. A packet asks that same person to reach the same conclusion privately, on their own timeline, with the reasoning already assembled and the sources already pulled. It is the same argument at a much lower cost to the person receiving it.
Credit belongs to the prosecutor here too. They read it, sat with the science, and reached the result the evidence supported. That does not always happen, and it should be said out loud when it does.
What this means if you hold a medical card and drive
Florida has hundreds of thousands of registered medical-cannabis patients, and many of them drive every day without the faintest idea that a lawful prescription offers no protection at a roadside stop.
A few things are worth understanding. Your patient card is not a defense to a DUI charge, and it does not prevent an arrest. A urine test can come back positive long after any effect has worn off, which means you can test positive on a day you were entirely sober. If you have an injury or a medical condition that affects your balance, say so clearly before any field exercises begin, and understand that the officer is supposed to account for it.
Most importantly, a drug DUI case is a science case. The question is never whether cannabis was in your body at some point. The question is whether the State can prove you were actually impaired at the moment you were driving, and those are very different things.
A note on this result
This post describes the outcome of one specific case. Every case is different, and prior results do not guarantee or predict a similar outcome in any future case. Nothing here is legal advice, and reading it does not create an attorney-client relationship. If you are facing a DUI charge in Florida, talk to a qualified DUI defense lawyer about the facts of your own situation.
