Blood Test DUI Cases In Florida
Daytona Beach DUI Blood Test Defense Lawyer
Retired Homicide Detective. Former DUI Investigator. Trial Attorney.
Many people assume that blood test evidence is impossible to challenge.
That is not true.
In fact, blood test DUI cases often involve some of the most complex legal, scientific, and constitutional issues in criminal defense.
Unlike breath testing, blood testing requires:
- Collection of biological evidence
- Proper storage
- Proper preservation
- Laboratory analysis
- Chain of custody documentation
- Expert interpretation
A mistake at any stage can affect the reliability of the results.
At the Law Offices of Patrick J. McGeehan, P.A., we carefully examine every aspect of blood test evidence.
Before becoming a lawyer, Patrick served as a police officer, DUI investigator, police instructor, traffic homicide investigator, and homicide detective.
He understands how serious DUI investigations are conducted because he participated in them.
Today, he uses that experience to challenge blood test evidence and protect his clients’ rights.
When Are Blood Tests Used In Florida DUI Cases?
Blood testing is far less common than breath testing.
However, blood tests are frequently encountered in more serious DUI investigations.
Examples include:
- Serious bodily injury crashes
- Fatal crashes
- DUI manslaughter cases
- Unconscious drivers
- Hospital blood draws
- Drug-impaired driving investigations
Because these cases often involve severe penalties, blood test evidence frequently becomes a central issue.
Why Blood Test Cases Are Different
Unlike a breath test, blood testing involves multiple individuals and multiple procedures.
Potential participants may include:
- Law enforcement officers
- Medical personnel
- Laboratory personnel
- Toxicologists
- Evidence custodians
Every person who handles the sample becomes part of the evidentiary chain.
Every step matters.
Blood Testing Is Not Immune From Error
Many people view blood tests as perfect scientific evidence.
They are not.
Errors can occur during:
- Collection
- Labeling
- Transportation
- Storage
- Analysis
- Reporting
The existence of a blood alcohol result does not automatically establish guilt.
The reliability of the evidence must still be evaluated.
Common Blood Test Issues
Improper Collection Procedures
Blood samples must be properly obtained.
Questions may arise regarding:
- Collection methods
- Collection materials
- Contamination risks
- Procedural compliance
Chain Of Custody Problems
The prosecution must establish the integrity of the sample.
Questions may include:
- Who collected the blood?
- Who transported it?
- Who stored it?
- Who tested it?
Gaps in the chain of custody may create significant issues.
Sample Contamination
Contamination can affect the reliability of laboratory results.
Potential contamination issues must always be considered.
Improper Storage
Biological samples must be properly preserved.
Improper storage may affect:
- Sample integrity
- Reliability
- Scientific validity
Laboratory Errors
Laboratories are operated by human beings.
Human error remains possible.
Potential issues may include:
- Testing mistakes
- Documentation errors
- Sample mix-ups
- Reporting mistakes
Blood Alcohol Concentration And Timing Issues
One of the most misunderstood aspects of DUI blood testing involves timing.
A blood test measures alcohol concentration at the time the sample is collected.
The test does not directly reveal a person’s alcohol concentration at the time of driving.
Those are not necessarily the same thing.
Questions frequently arise regarding:
- Absorption rates
- Elimination rates
- Drinking patterns
- Time delays
In some cases, these issues become critical.
Rising Blood Alcohol Defenses
Alcohol concentration does not remain static.
Depending on the circumstances, a person’s blood alcohol level may continue to rise after driving has ceased.
This can create important issues in certain cases.
Questions may include:
- When was alcohol consumed?
- How much was consumed?
- When was the blood sample obtained?
- Was absorption complete?
These issues often require careful analysis.
Drug-Impaired Driving Cases
Blood testing is frequently used in cases involving allegations of drug impairment.
These cases often present challenges different from alcohol cases.
Potential substances may include:
- Prescription medications
- Marijuana
- Controlled substances
- Combination drug use
The presence of a substance does not automatically establish impairment.
That distinction can be extremely important.
Medical Blood Draws Versus Law Enforcement Blood Draws
Blood evidence may originate from different sources.
Law Enforcement Blood Draws
These are obtained specifically for investigative purposes.
Hospital Blood Draws
Hospitals often collect blood for medical treatment.
Questions frequently arise regarding:
- Privacy issues
- Warrants
- Consent
- Medical records
These situations often involve unique legal considerations.
Search Warrants And Blood Draws
Blood draws frequently implicate constitutional protections.
Questions may include:
- Was a warrant required?
- Was consent obtained?
- Did an exception apply?
- Was the warrant valid?
Because blood testing involves an intrusion into the body, constitutional issues often become central to the defense.
Blood Tests In DUI Serious Bodily Injury Cases
Blood evidence frequently appears in DUI Serious Bodily Injury investigations.
These cases involve allegations that impairment contributed to a crash causing significant injuries.
The consequences can be severe.
Potential penalties may include:
- Significant prison exposure
- Long-term license consequences
- Permanent criminal records
Because the stakes are high, blood evidence must be carefully scrutinized.
Related Page:
DUI Serious Bodily Injury
Blood Tests In DUI Manslaughter Cases
Blood evidence is often a major component of DUI Manslaughter investigations.
These cases may involve:
- Fatal crashes
- Accident reconstruction
- Toxicology evidence
- Expert testimony
Because the potential consequences are enormous, every aspect of the blood testing process should be examined.
Related Page:
DUI Manslaughter
Blood Test Evidence And Accident Reconstruction
Serious crash investigations frequently involve both toxicology evidence and accident reconstruction.
Questions often include:
- What caused the crash?
- Was impairment a factor?
- Could the collision have been avoided?
- What role did driver behavior play?
The answers often require evaluation of both scientific and physical evidence.
Related Page:
Accident Reconstruction Lawyer
Common Defenses To Blood Test Evidence
Every case is different.
Potential defenses may include:
Illegal Stop
If the stop was unlawful, evidence may be challenged.
Illegal Arrest
An unlawful arrest may create significant legal issues.
Invalid Warrant
Questions regarding warrant validity frequently arise.
Lack Of Consent
The circumstances surrounding consent may become important.
Chain Of Custody Problems
Documentation issues may affect admissibility.
Laboratory Errors
Testing procedures and results must be carefully reviewed.
Rising Blood Alcohol
Timing issues may affect the significance of the results.
Constitutional Violations
Blood test cases frequently involve Fourth Amendment issues.
Frequently Asked Questions
Is A Blood Test More Accurate Than A Breath Test?
Blood testing is generally considered highly reliable when properly conducted.
However, reliability still depends on proper procedures.
Can Blood Test Results Be Challenged?
Absolutely.
Collection, storage, analysis, and constitutional issues may all be relevant.
What If The Blood Was Drawn At A Hospital?
Hospital blood draws often involve additional legal and evidentiary issues.
Does The Presence Of A Drug Mean I Was Impaired?
Not necessarily.
The presence of a substance and actual impairment are different issues.
Can A DUI Blood Test Case Be Dismissed?
Some cases are dismissed or successfully challenged based upon legal, constitutional, or evidentiary issues.
Every case depends upon its facts.
Why Clients Choose Patrick J. McGeehan
Many attorneys handle DUI cases.
Few have participated in serious DUI investigations before becoming lawyers.
Patrick’s background includes:
- Former DUI Investigator
- Police Officer
- Police Instructor
- Retired Traffic Homicide Investigator
- Retired Homicide Detective
- Trial Attorney
Many blood test cases arise from serious injury and fatal crashes.
Patrick’s experience investigating those cases provides valuable insight into how evidence is gathered and evaluated.
A Career Dedicated To Investigating The Facts
Every blood test case raises important questions.
Was the blood properly collected?
Was the sample preserved?
Was the laboratory analysis reliable?
Were constitutional protections respected?
Patrick has spent decades evaluating evidence and asking those questions.
As a police officer, DUI investigator, traffic homicide investigator, homicide detective, and trial attorney, he has devoted his career to uncovering facts and determining the truth.
That same commitment guides every DUI defense case today.
Contact A Daytona Beach DUI Blood Test Defense Lawyer
Blood test evidence may appear powerful.
That does not mean it should be accepted without scrutiny.
The science matters.
The procedures matter.
The constitutional issues matter.
Contact the Law Offices of Patrick J. McGeehan, P.A. today to schedule a consultation and learn how an experienced Daytona Beach DUI defense lawyer can evaluate blood test evidence and help protect your rights and your future.
Resources:
Leaving the Scene of an Accident With a Death
Fatal Crash Investigations in Florida