Getting arrested for DUI in Broward County feels like the case is already decided. Most drivers assume the breath test number is the number, the officer’s report is gospel, and the prosecutor holds all the cards. None of that is automatically true. A DUI case is built on a chain of evidence, and every link in that chain can be challenged, questioned, suppressed, or thrown out entirely when something wasn’t done correctly. People who understand this walk into court with real leverage. People who don’t tend to plead out to charges that could have been substantially reduced or dismissed.
The legal framework in Florida is specific, procedural, and full of places where law enforcement routinely makes mistakes. Challenging the traffic stop itself, the field sobriety tests, the breath or blood test results, the officer’s observations, and the chain of custody on any physical evidence are all standard parts of what a qualified criminal lawyer does on a DUI case. This isn’t about technicalities in the bad sense. It’s about whether the state can actually prove what it claims, by the rules it’s bound to follow.
Drivers charged with DUI in Broward County have options for local counsel, including firms like Piotrowski Law, Fort Lauderdale residents turn to for felony and misdemeanor defense. Regardless of which attorney someone retains, the mechanics of how DUI evidence gets challenged are the same across the country. What follows is the practical breakdown of where those challenges actually live in a case file.
The Traffic Stop Itself
Every DUI case starts with a stop. If the stop wasn’t lawful, everything that came after it becomes vulnerable to suppression.
Florida law requires reasonable suspicion of a traffic violation or some other articulable basis for the initial stop. An officer who pulls someone over on a hunch, on vague suspicion, or because the car was leaving a bar parking lot doesn’t have that basis. A criminal lawyer will pull the dashcam footage, the bodycam footage, the radar logs, and any traffic citation paperwork and compare what the officer wrote in the probable cause affidavit with what the video actually shows. Inconsistencies between the two happen more often than most people expect.
Checkpoint stops have their own rules. The stop must follow established procedures; officers must stop vehicles according to a non-discretionary pattern (every car, every third car, etc.); and the checkpoint must be publicly announced in advance. Any deviation from these requirements opens the door to a motion to suppress.
Field Sobriety Tests
The three tests that appear in almost every DUI case are the Horizontal Gaze Nystagmus (HGN) test, the Walk-and-Turn test, and the One-Leg Stand test. These are collectively called Standardized Field Sobriety Tests, and the operative word is standardized. If an officer doesn’t administer them according to the strict protocols laid out in the National Highway Traffic Safety Administration’s SFST manual, the results are subject to challenge.
Common problems include: giving instructions out of order, skipping the equal-tracking or pupil-size check on HGN, conducting the tests on uneven or sloped pavement, failing to account for medical conditions that produce false positives (inner ear issues, back injuries, certain eye conditions, prescription medications), or failing to demonstrate the test the way the manual requires. Video evidence makes all of this visible in hindsight.
A criminal lawyer who has actually studied the SFST manual (some have completed the same training courses the officers take) can walk through the video frame by frame and identify exactly where the administration fell short. That’s often enough to get HGN testimony excluded entirely, which takes a significant chunk of the state’s case with it.
Breath Test Evidence
Florida uses the Intoxilyzer 8000 for breath testing. The machine is regulated by the Florida Department of Law Enforcement, calibrated on a specific schedule, and operated under specific protocols.
Calibration and maintenance logs have to be produced in discovery. If the machine was due for calibration and didn’t receive it, or if the agency failed to preserve logs, a defense attorney can move to exclude the breath test result. Operator certification matters too. Only officers with current Agency Inspector certification are authorized to conduct breath tests, and certifications lapse.
The observation period is another common pressure point. Florida requires a 20-minute observation period before the first breath sample, during which the officer must continuously observe the subject to ensure that no belching, regurgitation, eating, drinking, or smoking occurs. If the officer looks away, leaves the room, or is simultaneously handling paperwork, the observation period is arguably compromised.
The Breath Test Refusal Issue
Refusing a breath test in Florida has its own set of consequences. Florida’s DUI and administrative suspension rules published by the Department of Highway Safety and Motor Vehicles spell out the implied consent framework, the license suspension periods for refusal, and the admissibility of refusal as evidence in a criminal case.
What many drivers don’t realize is that the refusal itself can be challenged. The officer must properly inform the driver of the consequences of refusal before the refusal is counted. If that implied consent warning was defective, garbled, delivered in the wrong language, or given after the fact, the “refusal” may not hold up at a formal review hearing or in trial. A 10-day window from the date of arrest to request a formal review hearing on the administrative suspension is among the most time-sensitive aspects of any DUI case.
Blood Test Evidence
Blood tests come up most often in cases involving accidents, injuries, or a refusal that escalated to a warrant. Blood draws require either consent, a warrant, or specific statutory exceptions for serious injury or death cases. A blood draw conducted without proper legal authority can be suppressed.
Beyond the question of legal authority, there’s a question of chain of custody. Who drew the blood? Were they qualified under Florida’s administrative code? How was the sample stored, labeled, transported, and analyzed? Chain-of-custody issues don’t always win cases outright, but they create reasonable doubt and often drive plea negotiations into better territory.
The Time Factor
DUI cases in Florida have multiple overlapping deadlines. The 10-day administrative hearing request, discovery deadlines, motion deadlines for suppression, and speedy trial clocks all run simultaneously. A case that isn’t actively being worked on from week one loses opportunities that cannot be recovered later.
That’s the real value of early legal counsel. Not just knowing the law, but acting on it while the evidence is still fresh, the witnesses are still reachable, and the procedural clock is still in the defendant’s favor.
A DUI charge is serious, but it isn’t a foregone conclusion. The system has rules, and when the state doesn’t follow them, the case can and does fall apart.
