The pages in the rest of this section take the State’s evidence apart one piece at a time. This section puts it back together for trial. A drug case has a shape, and once you see it, the defense becomes clear: the State has tests, opinions, and numbers, and the law requires something none of them is, an impaired person behind the wheel. Winning is a matter of keeping that distinction in front of the jury from opening to verdict.
Three ideas carry a drug defense, and each has its own page below. As an ACS-CHAL Forensic Lawyer-Scientist, an NHTSA field sobriety test instructor, and a lawyer trained in the drug recognition protocol, I build the trial story on the science rather than around it. See what the Lawyer-Scientist training covers.
Keeping the Person at the Center
The first move is to put the driver, not the lab report, at the center of the case. The law asks whether this person’s normal faculties were impaired when they drove. A test result, a category opinion, and a concentration each describe something else, and a jury that stays focused on the person can see the difference between a number and a human being who was driving normally.
The defense keeps the jury’s eye on the right column. A test, an opinion, and a number describe the left column, and none of them is the impaired person the law requires the State to prove.
The shape of the defense
A drug case is defended by keeping three things in view at once: that presence is not impairment, that every method was validated for less than the State claims, and that the case is about a person and not a number. Hold those together and the State’s confident pile of evidence starts to look like what it is, a set of facts that point near the question without answering it.
The Three Themes
Each page below develops one part of the trial story.
Science as the Spine of the Story
A drug trial is unusual in how much rests on the science. The eye test, the roadside exercises, the drug recognition opinion, and the toxicology all carry an air of authority, and a jury will give them weight unless someone who knows them from the inside shows where they stop. That is the work: not attacking science in general, but holding each specific method to what it was validated to do, so the jury can weigh it fairly. The themes in this section are how that work becomes a story a jury can follow.
I started out as an Assistant Public Defender in Florida’s Thirteenth Judicial Circuit, in Tampa, and today I am one of six ACS-CHAL Forensic Lawyer-Scientists in Florida. I work both the science and the procedure in your case the way the State’s own analysts and officers are trained to, and I show a jury the exact point where the evidence does not hold up. Learn more about my background.
Questions About Trial Defense
How is a drug DUI won at trial?
By holding the State to its burden. With no per se drug limit, the State must prove that your normal faculties were impaired when you drove, and the defense works to show that its evidence proves presence or exposure rather than impairment. The pages in this section pull that theme together.
What is the central theme of a drug defense?
That the case is about a person's ability to drive, not about a number or a label. A test, an opinion, and a concentration each describe something other than impaired driving, and the defense keeps the jury focused on what the law requires.
What is the validity gap?
The recurring distance between what a method was validated to do and what the State claims it proves. Eye signs, roadside exercises, a drug recognition opinion, a urine result, and a concentration were each validated for one thing and offered to prove another.
Should I take my drug case to trial?
That depends on facts no general page can know, and it is a decision to make with a lawyer. Some drug cases are far more triable than the State's confidence suggests, particularly when the proof is presence rather than impairment, and the factors that matter are set out here to discuss, not as advice.
Why does your forensic background matter at trial?
Because a drug defense is won on the science as much as on the law. Knowing the testing, the drug recognition protocol, and the field exercises from the inside lets me show a jury where each piece falls short of what it is offered to prove.
Related pages: Drugged driving overview, presence is not impairment, the drug recognition expert, and how drugs are tested.
This page is general information, not legal advice, and it does not create an attorney-client relationship. Whether to try or resolve a case depends on facts this page cannot know, and nothing here is a recommendation about any specific case. Drug DUI in Florida is governed by Fla. Stat. 316.193. Procedures and rules change, and every case turns on its own facts. Past results do not guarantee a similar outcome.
