I’m Rocky Brancato, founder of The Brancato Law Firm, P.A., a Tampa criminal defense firm. I am a member of the National College for DUI Defense, and after a crash that sends a driver to the hospital, the fight over the medical file — and the blood-alcohol result inside it — is often the fight over the entire case. Our attorneys litigate these subpoenas before the records are ever produced.

Are Medical Records Private in Florida?

Yes — and the protection is stronger than most people realize, because it is constitutional. Florida courts have long recognized that individuals enjoy a right of privacy in their medical records under article I, section 23 of the Florida Constitution. That right is not absolute, but it yields only to a compelling governmental interest, and in a criminal investigation the State establishes that interest only by showing a clear connection between suspected illegal activity and the person whose privacy it wants to invade.

On top of the constitutional right sit two statutes. Section 395.3025, Florida Statutes, makes hospital patient records confidential and forbids disclosure without your consent — with a narrow exception in subsection (4)(d) allowing disclosure in a civil or criminal action “upon the issuance of a subpoena from a court of competent jurisdiction and proper notice by the party seeking such records to the patient or his or her legal representative.” Section 401.30, Florida Statutes, gives similar confidentiality to emergency medical services and ambulance records. The State cannot simply ask the hospital for your file; it must go through a judge, and it must tell you first.

What Must the State Prove to Subpoena Your Records?

The State must show a nexus between the records it wants and a material issue in the investigation — and Florida’s Second District, whose decisions govern Hillsborough, Pinellas, and Pasco Counties, has broken that burden into two parts. In Leka v. State, 283 So. 3d 853 (Fla. 2d DCA 2019), a driver was hospitalized after a crash and prosecutors sought his hospital records before any charge had even been filed; the court held the State must (1) identify a theory that reasonably makes the records relevant and (2) produce some evidence making it reasonable to expect the records will support that theory. Because the State offered only vague testimony, never introduced the accident report, and never even identified which records it wanted, the Second District quashed the subpoena order.

Leka also teaches what the State can rely on when it does its homework: the court acknowledged that a judge may look to the State’s argument together with the accident report or the probable cause affidavit to establish relevance. The difference between a subpoena that survives and one that gets quashed is usually whether the State actually put that supporting material in front of the judge — and whether anyone was there holding it to that burden.

What Did the Roberts and Savage Decisions Say?

The Sixth District’s decision in Roberts v. State, 405 So. 3d 383 (Fla. 6th DCA 2023) is the sharpest statement of the State’s burden. Scott Roberts was under DUI investigation, and at the hearing on the State’s motion to subpoena his medical records, the prosecutor presented no evidence at all — just argument referring to the motion itself, which was unsworn, and attachments that were unsigned and unsworn. The court held that argument referring to unsworn paperwork is not evidence, granted certiorari, and quashed the subpoena order — adding that improper disclosure of records protected by sections 395.3025 and 401.30 is an injury that can never be undone on appeal.

Then, on August 3, 2026, the same court decided Savage v. State, No. 6D26-1612 (Fla. 6th DCA Aug. 3, 2026), a certiorari petition challenging a medical-records subpoena order out of Collier County. The court denied the petition in a single line — but the authorities it lined up against each other tell the real story. On one side, its own Roberts decision, requiring actual evidence of the nexus; on the other, McKnight v. State, 335 So. 3d 190 (Fla. 5th DCA 2022), and State v. Tavenese, 321 So. 3d 252 (Fla. 4th DCA 2021), both stating that a court may rely on the State’s argument and the accident report or probable cause affidavit. How much proof the State must actually bring to the hearing remains contested ground across Florida’s districts — which means these hearings are winnable, and worth fighting, right now.

Do You Get Notified Before the State Takes Your Records?

Yes — notice is a statutory requirement, and it is your opening to fight back. Section 395.3025(4)(d) conditions disclosure on “proper notice by the party seeking such records to the patient or his or her legal representative.” That notice exists so you can object before the hospital hands anything over: through counsel, you can contest the State’s showing at the hearing, and if the trial court gets it wrong, seek immediate review by petition for writ of certiorari — the route taken in Leka, Roberts, and Savage. Appellate courts accept these petitions precisely because, as Roberts put it, once private medical information is disclosed, the harm cannot be remedied later.

That is also why speed matters more here than almost anywhere else in a DUI case. The window to object runs from notice to the hearing date. A driver who waits until arraignment to hire counsel has usually let the single best suppression opportunity in the case pass unopposed.

How Is a Records Subpoena Different From a Blood Draw?

September 2026 update: The blood-draw side of this comparison has just been clarified. In State v. Marlin, No. 4D2025-1448 (Fla. 4th DCA Sept. 2, 2026), the Fourth District affirmed suppression of a forced blood draw in a fatal Turnpike crash, held that the natural dissipation of alcohol is never a per se exigency, and receded from the “probable cause” language in State v. Acevedo that prosecutors had been treating as an exception to the warrant requirement. Absent actual consent or case-specific exigent circumstances, a warrant is required — regardless of Florida’s implied consent law. Our full analysis is in can police take your blood without a warrant in Florida.

They are entirely different legal events, governed by different rules — and defending a hospital-crash DUI means fighting both. A law-enforcement blood draw is taken by or at the direction of police under Florida’s implied-consent framework, and it is attacked through the Fourth Amendment: warrant, consent, or true exigency. Medical blood is different: the hospital drew it for treatment, the results sit in your patient file, and the State’s only lawful path to them is the subpoena process described on this page. We cover the law-enforcement draw — and the recent appellate scrutiny it has received — in our guides to DUI manslaughter in Florida and how DUI manslaughter cases are defended.

The practical consequence: after a serious crash, the State often has no admissible blood evidence unless it wins the subpoena hearing. That hearing — held while you are still recovering, often before charges are filed — can decide whether the most damaging number in the case ever reaches a jury.

When Does This Fight Happen — Before or After Charges?

Usually before. In crash cases with injuries, the State frequently seeks hospital records during the investigation, weeks or months before any charging decision — Leka involved a subpoena sought before a single citation had been issued. That timing creates a trap: many drivers assume that because they have not been charged, they do not need a lawyer yet. In reality, the pre-charge window is when the decisive privacy fight happens, and it is also when defense counsel can engage prosecutors before momentum builds — the same early-intervention approach our attorneys use across serious traffic cases like vehicular homicide.

How Do We Defend Against a Medical Records Subpoena?

We litigate the State’s burden element by element. Is there a genuine theory of relevance, or boilerplate? Did the State bring evidence — an accident report, a sworn affidavit, testimony — or just argument, which Roberts holds is not enough? Is the requested scope limited to the crash, or a fishing expedition through your medical history? Was the statutory notice proper? And if the trial court signs off anyway, we evaluate immediate certiorari review, where the standard — a departure from the essential requirements of the law causing irreparable harm — is exactly what these cases involve. If records were already produced, the fight shifts to excluding them and everything derived from them.

Because I am an NCDD member and our attorneys handle hospital-crash DUI cases across Tampa Bay, we also read the medical file the State wants with a defense eye: trauma-room blood results are measured on serum, not whole blood, and the difference — along with chain-of-custody and conversion disputes — gives a second layer of defense even when records come in.

Frequently Asked Questions About Medical Records in Florida DUI Cases

Can police just ask the hospital for my blood results?

No. Hospital records are confidential under section 395.3025, Florida Statutes, and protected by Florida’s constitutional right of privacy, so the State needs a court-issued subpoena and proper notice to you before the hospital may disclose them in a criminal matter. A disclosure outside that process is itself a ground for relief. Our attorneys check exactly how the State obtained every medical record in the file.

Does a DUI crash automatically give the State access to my records?

No. A crash plus a hospital visit is not, by itself, a nexus. Under Leka v. State, 283 So. 3d 853 (Fla. 2d DCA 2019) — the controlling decision in the Tampa Bay area — the State must offer a theory of relevance and evidence supporting it, such as documented impairment indicators, and the court must consider the scope of what is requested.

What happens at the subpoena hearing?

The State presents its justification, and the defense can contest it — that is where cases like Roberts are won, because argument alone is not evidence. If the judge grants the subpoena anyway, the ruling can be challenged immediately by petition for writ of certiorari rather than waiting for a trial. The Brancato Law Firm, P.A. treats this hearing as the first suppression battle of the case.

I got a notice that the State wants my hospital records. How long do I have?

Act immediately — your opportunity to object runs from the notice to the hearing, and once records are disclosed the harm cannot be undone, which is exactly why appellate courts allow emergency review in these cases. Call (813) 727-7159 as soon as the notice arrives, before the hearing date, so counsel can appear and put the State to its burden.

Can the State get records from before the crash?

The scope of the subpoena is part of the State’s burden. Courts evaluating these requests consider whether the records sought are connected to the issues in the investigation, and Leka faulted the State for never even identifying which records it wanted. Overbroad requests reaching into unrelated medical history are a primary target when we contest these subpoenas.

What if my records were already turned over?

The fight is not over. Improperly obtained records can be challenged through certiorari and suppression litigation, and how the blood was analyzed — hospital serum values versus legal whole-blood standards — remains contestable even for records that come in. The Brancato Law Firm, P.A. reviews both the legality of the disclosure and the science inside the file; call (813) 727-7159 for a free, confidential review.

For more about our defense strategies, visit our Hillsborough County Criminal Defense Attorney page.

Related reading: What Is DUI in Florida? · What Is DUI Manslaughter in Florida? · How DUI Manslaughter Cases Are Defended in Florida · What Is Vehicular Homicide in Florida?

The Most Important Hearing in Your DUI Case May Happen Before You’re Charged

If you were hospitalized after a crash in Hillsborough, Pinellas, or Pasco County and the State wants your medical records, the hearing on that subpoena may decide your case before a charge is ever filed. Call the attorneys of The Brancato Law Firm, P.A. — founded by Tampa Criminal Defense Attorney Rocky Brancato — at (813) 727-7159 the day the notice arrives, because once your records are disclosed, no court can make them private again.

The Brancato Law Firm, P.A.
620 E. Twiggs Street, Suite 205, Tampa, FL 33602
(813) 727-7159
Serving Hillsborough, Pinellas, and Pasco Counties

The Brancato Law Firm, P.A. is a Tampa-based criminal defense practice. We are not affiliated with any other Brancato-named law firms.

Impaired driving sits behind a large share of fatal crashes, with an estimated 11,904 alcohol-impaired-driving deaths in 2024 according to NHTSA. Fatal-crash cases draw intense pressure from prosecutors and the public, and that pressure is part of what a defense has to work against. At The Brancato Law Firm, we defend these cases across Hillsborough, Pinellas, and Pasco Counties, and our founder Rocky Brancato has tried more than 150 jury trials to verdict. Our starting point is straightforward: a serious charge is not the same as a hopeless one.

On paper, DUI manslaughter carries a four-year mandatory minimum. The realistic sentencing exposure is closer to ten years once Florida’s scoresheet is run. That gap is exactly why these cases are worth fighting hard, and why the work has to start fast.

What the State has to prove in a DUI manslaughter case

Under Florida Statute 316.193, the State has to prove three things beyond a reasonable doubt:

• The accused drove or was in actual physical control of a vehicle.
• The accused was impaired to the point that normal faculties were affected, or had a blood-alcohol or breath-alcohol level of 0.08 or higher.
• By reason of that operation, the accused caused or contributed to causing a death.

There is no intent requirement. The driver does not have to mean to hurt anyone. For a plain-language breakdown of the charge and its penalties, see our guide on what DUI manslaughter involves.

Impairment can be proven two separate ways. The “normal faculties” theory relies on officer observations, driving pattern, and field sobriety exercises. The “per se” theory relies on a chemical test reading of 0.08 or higher. Each path has its own weaknesses, which is why a real defense looks hard at both.

Why causation is where these cases are really won or lost

Florida’s causation standard is unusually low, and that is the most important thing for anyone facing this charge to understand. The statute requires only that the impaired operation “caused or contributed to causing” the death. The Florida Supreme Court in Magaw v. State held that the State does not have to prove the driver’s drinking caused the crash. It only has to prove that the operation of the vehicle did, and that any lack of care attributable to the impaired driver will satisfy the standard. Later cases like State v. Hubbard confirmed that simple negligence is enough and the driver need not be the sole cause.

That sounds discouraging. It is actually where the leverage is. Because the standard is so low, the defense invests heavily in proving that something else was the real cause.

There is a hard limit on the State’s theory. If the victim’s own conduct was the sole proximate cause of the death, there is no DUI manslaughter. The classic illustration is a pedestrian who darts into traffic where no sober driver could have avoided the collision. Impairment does not turn an unavoidable accident into a homicide.

This is why independent accident reconstruction is the single strongest line of defense. A reconstructionist examines:

• Speed, point of impact, and the angle of the collision
• Visibility, lighting, weather, and road conditions
• Whether a second driver ran a red light or otherwise intervened
• Whether a vehicle defect, such as failed brakes, a tire blowout, or steering failure, caused the loss of control

We have seen a mechanical failure rather than the driver change the entire analysis of a crash. The cause is not always the person behind the wheel. We have also taken causation fights to a jury, including a fatal wrong-way crash on the Selmon Expressway where the central battle was the State’s theory of what actually caused the collision. DUI manslaughter is a homicide charge, and we approach it with the same forensic depth we bring to any homicide defense. Each case is unique, and past results do not guarantee future outcomes.

Why the four-year mandatory minimum understates the real exposure

The statute sets a four-year mandatory minimum, and many people stop reading there. The real number is usually higher because of how Florida scores these cases.

DUI manslaughter is a Level 8 offense under Florida’s Criminal Punishment Code. A primary Level 8 offense scores 74 sentencing points. A death adds 120 victim-injury points. The code then subtracts 28 from the total and multiplies the remainder by 0.75 to produce the lowest permissible prison sentence. Because a death is always part of a DUI manslaughter case, the math runs like this:

• 74 points (primary offense) plus 120 points (death) equals 194 points
• 194 minus 28 equals 166
• 166 multiplied by 0.75 equals 124.5 months, or about 10.4 years

When the guideline floor is higher than the mandatory minimum, the higher number controls, unless the judge grants a lawful downward departure. So the working exposure on a standard DUI manslaughter case is closer to ten years than four. The same scoresheet, run without the death points, would land near 34.5 months. The death points are what make these cases so serious, and they are also why a credible attack on impairment or causation matters so much to the final sentence.

How Trenton’s Law changed DUI manslaughter penalties in 2025

Trenton’s Law, passed as HB 687, took effect on October 1, 2025, and raised the stakes considerably for repeat fatal-driving cases. Two changes matter most.

First, a prior conviction for DUI manslaughter, BUI manslaughter, vehicular homicide, or vessel homicide now elevates a new DUI manslaughter to a first-degree felony, with exposure up to 30 years. Older priors count regardless of how long ago they happened.

Second, the law made refusing a breath or urine test its own separate crime in certain circumstances. The decision to refuse a test now carries its own consequences, which makes early legal advice even more important. We cover the mechanics in our explainer on refusing a breath test in Florida.

The practical takeaway: if there is any prior fatal-driving conviction in the picture, the case is in first-degree-felony territory, and the defense strategy changes accordingly.

How the chemical evidence gets challenged

The State’s impairment proof usually rests on a breath or blood test. Both are heavily regulated, and both are genuinely vulnerable when the rules are not followed.

Challenging the Intoxilyzer 8000 breath test

Florida’s evidentiary breath instrument is regulated by the Florida Department of Law Enforcement under Administrative Code Rule 11D-8. The defense can subpoena every maintenance, repair, and monthly-inspection record for the specific machine used and look for:

• Gaps in the required agency inspections
• Unauthorized repairs (only the manufacturer or an approved facility may repair the machine)
• A missing or interrupted 20-minute observation period, which guards against mouth-alcohol contamination
• Radio-frequency or temperature interference, which is worse when the machine sits in a patrol vehicle

Florida courts have excluded breath results when the program failed to follow these rules.

Challenging the blood test

In fatal crashes, blood is usually drawn. The defense scrutinizes the draw technique (an alcohol swab where a non-alcohol antiseptic is required can contaminate the sample), the chain of custody from collection through testing, and whether the lab measured hospital serum or plasma rather than whole blood. Serum readings tend to run higher than whole-blood readings, so an apparent number over 0.08 can shrink once an expert converts it correctly. Florida law also limits who may draw the blood to specific medical personnel.

Rising BAC and retrograde extrapolation

Alcohol keeps absorbing for roughly 30 to 90 minutes after drinking. A sample taken an hour or more after driving can overstate the BAC at the time the person was actually behind the wheel. A forensic toxicologist can work backward to argue the driver was below 0.08 while driving. We explore this in detail in our case study on why your BAC at the station is not your BAC behind the wheel.

Challenging the stop and the warrantless blood draw

September 2026 update: The law on warrantless blood draws just moved decisively in the defense’s favor. In State v. Marlin, No. 4D2025-1448 (Fla. 4th DCA Sept. 2, 2026), the Fourth District affirmed suppression of a forced blood draw in a fatal Turnpike crash, held that the natural dissipation of alcohol is never a per se exigency, and receded from the “probable cause” language in State v. Acevedo that prosecutors had been treating as an exception to the warrant requirement. Absent actual consent or case-specific exigent circumstances, a warrant is required — regardless of Florida’s implied consent law. Our full analysis is in can police take your blood without a warrant in Florida.

Two constitutional challenges come up repeatedly in fatal-crash cases.

The first is the stop. An officer needs reasonable suspicion of a traffic violation or probable cause of a crime to pull a vehicle over. If the stop was unlawful, everything that followed, including officer observations, the breath test, and the blood draw, can be suppressed as fruit of an illegal stop.

The second is the blood draw. The U.S. Supreme Court held in Missouri v. McNeely that a warrantless blood draw requires genuine exigent circumstances, and that the natural dissipation of alcohol is not, by itself, an automatic emergency. If officers had time to get a warrant and did not, the blood result may be thrown out. In a fatal crash where the driver is taken to a hospital, there is often time to seek a warrant, which makes this a live issue in many cases.

Why scene and hospital statements often get suppressed

People involved in a fatal crash are frequently questioned at the scene or in the hospital while in shock. What they say can often be kept out of evidence.

Florida’s accident-report privilege, found in Section 316.066, provides that a crash report or a statement made to an officer for the purpose of completing one may not be used as evidence in any trial, civil or criminal. Under what Florida courts call the “changing hats” doctrine, an officer has to affirmatively tell the driver that the crash investigation is over and a criminal investigation has begun, then give Miranda warnings, before those statements become admissible. Statements made during the crash-investigation phase, without that switch, are privileged.

This is a powerful suppression tool. It does not cover everything. An officer can still testify to physical observations like the odor of alcohol or slurred speech. But admissions made while a frightened driver believed he was simply helping complete a report often cannot be used against him.

The experts who actually move these cases

A serious DUI manslaughter defense is built on retained experts, and the order matters. Reconstruction comes first, because causation is the element with the most leverage.

• Accident reconstructionist. Establishes speed, impact geometry, and what actually caused the crash.
• Forensic toxicologist. Interprets BAC, handles retrograde extrapolation, and addresses serum-versus-whole-blood conversion.
• ASE-certified mechanic. Inspects the vehicle for a defect that caused the loss of control.
• Medical expert. Addresses cause of death and any pre-existing conditions.

All expert testimony has to satisfy Florida’s Daubert standard before a jury hears it. Our firm maintains a network of forensic experts, including forensic pathologists, accident reconstruction specialists, and former medical examiners. Our founder also spent years as a police academy instructor, training officers on how to investigate and testify, which sharpens cross-examination of the State’s witnesses. This is the forensic rigor we bring when we challenge the State’s forensic evidence, and it is the same standard we apply regardless of the charge. Each case is unique, and past results do not guarantee future outcomes.

DUI manslaughter vs. vehicular homicide, and how they get stacked

A fatal crash often produces two charges from the same event: DUI manslaughter and vehicular homicide. They are both second-degree felonies, but they require the State to prove different things.

When both charges are filed, the defense builds independent defenses for each so the counts do not stack against the client. You can read more about the recklessness standard in our explainer on vehicular homicide in Florida.

What does a realistic reduction look like? Because of the mandatory minimum, the only path below four years is a negotiated reduction to a lesser charge, such as DUI with serious bodily injury or reckless driving, or a lawful downward departure. Reductions are harder to win in fatal cases than in standard DUIs, because prosecutors face public pressure. What moves the needle is the strength of the defense. A genuine problem with the State’s impairment proof, a credible causation theory pointing elsewhere, or suppressible evidence is what makes the State willing to talk.

Why the first 72 hours matter most

The single most important thing a person facing this charge can do is get an experienced Tampa DUI defense team working immediately. Fatal-crash investigations move fast, and evidence disappears.

In the first hours and days after a crash, the defense can:

• Preserve the vehicle’s event data recorder, or black box, which can show speed and braking before impact
• Track down dashcam and nearby surveillance footage before it is overwritten
• Identify and interview witnesses while memories are fresh
• Assert the accident-report privilege before damaging statements get locked in
• Get an independent reconstruction started while the scene is still intact

Once skid marks fade, footage is recycled, and witnesses scatter, that leverage is gone. Early counsel preserves the evidence the defense will need later. The sooner it starts, the more there is to work with.

Frequently asked questions about DUI manslaughter in Florida

Is DUI manslaughter a felony in Florida?

Yes. It is a second-degree felony punishable by up to 15 years in prison. It becomes a first-degree felony, with exposure up to 30 years, if the driver left the scene or has a qualifying prior conviction under Trenton’s Law.

What is the minimum sentence for DUI manslaughter in Florida?

The statute sets a four-year mandatory minimum. In practice, the sentencing scoresheet usually produces a higher floor, often around 124.5 months (about 10.4 years), because a death adds 120 points to the calculation.

Can a DUI manslaughter charge be reduced or dropped?

Sometimes. Because of the mandatory minimum, the routes below four years are a negotiated reduction to a lesser charge or a lawful downward departure. A serious problem with the State’s proof of impairment or causation is usually what makes a reduction realistic.

Does the State have to prove the driver caused the crash?

The State has to prove the impaired driving caused or contributed to the death, which is a low standard. But if someone else, or the victim’s own conduct, was the sole cause of the crash, there is no DUI manslaughter.

Serious charges still have real defenses

A DUI manslaughter charge is among the most serious a person can face in Florida, and the exposure is real. But the State carries the burden on impairment and on causation, and both are open to challenge. The chemical evidence has to be collected and maintained by the rules. The stop and the blood draw have to satisfy the Fourth Amendment. The cause of the crash has to hold up against an independent reconstruction. The work that decides these cases starts long before trial.

This is the kind of case our firm is built for. We keep a limited caseload so every case gets thorough preparation, we prepare every matter as if it will go to trial, and our founder ran the largest criminal defense operation in Tampa Bay as Chief Operations Officer of the Hillsborough County Public Defender’s Office, where he oversaw a staff of over 100 attorneys. That system-level knowledge informs how we read a fatal-crash case from the first day.

If you or someone in your family has been arrested or is under investigation for DUI manslaughter in the Tampa Bay area, the sooner you have a defense team in place, the more evidence can be preserved and the more options stay open. Call The Brancato Law Firm at (813) 727-7159 for a free, confidential consultation.

Each case is unique. Past results do not guarantee future outcomes.

When someone is arrested for DUI, the blood alcohol concentration (BAC) measured at the police station or hospital is not necessarily the same as their BAC when they were actually driving.

Alcohol takes time to absorb into the bloodstream. Depending on when the person had their last drink, what they ate, and their individual physiology, their BAC at the time of driving could have been significantly lower—or even below the legal limit.

This is not a technicality. It is science. And in this DUI manslaughter case, a forensic toxicologist used that science to prove our client was not unlawfully impaired at the time of the crash.  I am Tampa Criminal Defense Attorney Rocky Brancato. This post is part of our forensic series put out by the Brancato Law Firm, P.A., your Tampa criminal forensic evidence law firm.

The Case: A Tragic Crash and a Grieving Mother

Our client was involved in a fatal crash at an intersection. She was making a left-hand turn when another vehicle T-boned her car. Tragically, her own child died in the collision.

When her BAC was measured after the crash, it was above the legal limit of 0.08. Based on that number, she was charged with DUI manslaughter—a first-degree felony under Florida Statute 316.193, punishable by up to 15 years in prison.

But the BAC number alone did not tell the whole story. And the crash itself raised serious questions about who was really at fault.

The Video: Evidence of the Other Driver’s Speed

Video footage of the crash revealed something critical: the other driver was traveling at nearly twice the posted speed limit when he entered the intersection.

Our client was making a left turn—a maneuver that requires judging the distance and speed of oncoming traffic. But how can anyone accurately judge an oncoming vehicle that is traveling far faster than any reasonable driver would expect?

This raised the first major defense issue: causation. Even if our client had alcohol in her system, was her driving actually the cause of the crash? Or was the crash caused by the other driver’s reckless speed?

Expert #1: The Accident Reconstructionist

To address the causation question, we retained an accident reconstructionist—a former Captain with the Florida Highway Patrol who had investigated hundreds of fatal crashes during his career.

He analyzed the video footage, the physical evidence, and the dynamics of the collision. His conclusion: based on the speed the other driver was traveling, our client would not have been able to anticipate that her left-hand turn would result in a collision.

In his expert opinion, her decision to turn was not at fault. The other driver’s excessive speed was the cause of the crash.

However, the accident reconstructionist could not render an opinion on our client’s BAC. That was a different question requiring a different expert.

Expert #2: The Forensic Toxicologist

The prosecution’s case rested heavily on the BAC measurement taken after the crash. They assumed that if our client’s BAC was above 0.08 at the station, it must have been above 0.08 when she was driving.

But that assumption ignores the science of alcohol absorption.

We retained a forensic toxicologist to analyze our client’s statements to police. Those statements revealed important details:

• She had eaten a big meal before leaving
• She had consumed a drink right before she left
• The crash occurred shortly after she began driving

The Forensic Toxicologist’s Analysis

Using retrograde extrapolation, the forensic toxicologist worked backward from the BAC measurement taken after the crash. She factored in:

• The time between the crash and the BAC test
• The time of our client’s last drink
• The large meal she had consumed (which slows absorption)
• Standard rates of alcohol absorption and elimination

Her conclusion was significant: based on the timing of the last drink and the meal, that final drink would not have been fully absorbed at the time our client was driving.

In other words, our client was not unlawfully under the influence at the time of the crash. Her BAC rose to above 0.08 only later—after the crash, during the absorption phase—when the alcohol from that last drink finally entered her bloodstream.

What This Case Teaches About DUI Defense

• The BAC at the station is not necessarily the BAC at the time of driving. Retrograde extrapolation can establish that the defendant’s BAC was lower—or below the legal limit—when they were actually behind the wheel.
• A recent drink may not have been absorbed yet. Alcohol consumed shortly before driving may not enter the bloodstream until after the crash, causing the BAC to rise between the incident and the test.
• Food slows alcohol absorption. A large meal can significantly delay how quickly alcohol enters the bloodstream, which affects the timing analysis.
• Multiple experts may be needed for different issues. In this case, causation and impairment were separate questions requiring separate experts.
• The defendant’s own statements can help the defense. Statements about when she drank and what she ate provided the data the toxicologist needed for the retrograde extrapolation.

Frequently Asked Questions

What is retrograde extrapolation?

Retrograde extrapolation is a forensic toxicology technique used to estimate a person’s blood alcohol concentration at an earlier time based on a later measurement. By analyzing factors like when the person drank, what they ate, and standard absorption rates, a toxicologist can calculate whether BAC was higher or lower at the time of driving.

Can my BAC go up after I stop drinking?

Yes. Alcohol takes time to absorb into the bloodstream—typically 30 minutes to 2 hours. If you had a drink shortly before driving, your BAC may continue to rise after you stop drinking, during the absorption phase. This means your BAC at the police station could be higher than your BAC when you were driving.

What is a forensic toxicologist?

A forensic toxicologist is a scientist who specializes in the effects of drugs and alcohol on the human body and how to detect them. In criminal cases, they analyze blood, urine, and other samples, and can testify about impairment, absorption rates, and retrograde extrapolation.

Does eating affect alcohol absorption?

Yes. Food in the stomach—especially a large meal—significantly slows alcohol absorption. This means that if you eat before drinking, the alcohol will take longer to enter your bloodstream. A forensic toxicologist considers this factor when calculating BAC at the time of driving.

What is DUI manslaughter in Florida?

Under Florida Statute 316.193, DUI manslaughter occurs when a person driving under the influence causes the death of another person. It is a second-degree felony punishable by up to 15 years in prison. If the driver knew or should have known the crash occurred and failed to render aid, it becomes a first-degree felony punishable by up to 30 years.

Do I need both an accident reconstructionist and a toxicologist?

It depends on the case. If causation is disputed—meaning it is unclear whether your driving caused the crash—an accident reconstructionist can address that issue. If impairment is disputed, a forensic toxicologist can address BAC at the time of driving. Some cases require both experts to cover different aspects of the defense.

Facing DUI or DUI Manslaughter Charges?

A BAC number is not the end of the story. The prosecution must prove you were impaired at the time of driving—not at the time of the test. With the right forensic analysis, that assumption can be challenged.

For over 25 years, I have defended clients against serious charges in Tampa Bay. I understand the science of alcohol absorption, I work with forensic toxicologists and accident reconstructionists, and I know how to present complex technical evidence to juries in a way they can understand.

Call (813) 727-7159 for a Confidential Consultation

The Brancato Law Firm, P.A.

620 E Twiggs Street, Suite 205, Tampa, FL 33602

Serving Hillsborough, Pinellas, and Pasco Counties

Part of the Forensic Evidence Series

Related Case Studies: DNA Evidence Defense | Aggravated Child Abuse Defense | Forensic Pathologist | Fingerprint Evidence is Not as Reliable as You Think | Cell Phone Location Data Can prove You Were Not There | When Brain Damage Explains Criminal Conduct | When Police Destroy Evidence They Do Not Get the Benefit of the Doubt | When a Confession is Not a Confession | When the Car–Not the Driver–Caused the Crash | The Injuries Were Real–But They Were Not From the Alleged Rape | Similar Is not The Same: How a Firearms Expert Kept Out Prejudicial Evidence

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Tampa DUI Attorney

Tampa Murder Attorney

Why Expert Witnesses are Not Optional in Major Crimes Cases