Field Sobriety vs. Medical Conditions
Many drivers think a “failure” on a walk-and-turn exercise is an irrefutable biological confession of intoxication. They assume that if you stumble, sway, or fail to track a pen with your eyes, your blood must be saturated with alcohol.
Wrong. In the high-stress environment of a midnight traffic stop, what looks like “impairment” to an officer is often just a documented medical reality.
At Drew Fritsch Law Firm, P.A., we know that a Standardized Field Sobriety Test (SFST) is a physical performance that requires a level of orthopedic and neurological health that many sober people simply do not possess.
If you’ve been arrested, a Punta Gorda DUI lawyer can help you prove that your unsteady feet were the result of a pre-existing condition, not a high BAC.
The Myth of the “Standard” Human
The National Highway Traffic Safety Administration (NHTSA) developed these tests based on “ideal” subjects under “ideal” conditions.
But the world isn’t a laboratory, and the human body is remarkably complex. When an officer puts you through the paces, they are looking for “clues” of impairment under Florida Statute § 316.193, but they rarely pause to ask if your “normal faculties” are already limited by a physical disability.
We deconstruct these “failures” by looking at the technical literacy of the testing environment and your own medical history:
- Horizontal Gaze Nystagmus (HGN) and Vision: While officers look for a “jerking” of the eye, dozens of conditions (including natural nystagmus, cataracts, or even inner-ear infections) can cause the exact same reaction.
- The orthopedic barrier: If you have had a knee replacement, suffer from chronic back pain, or deal with arthritis, the “walk-and-turn” or “one-leg stand” is a setup for failure. In 2026, we utilize medical experts to prove that a client’s “stumble” was an involuntary response to joint pain, not alcohol.
- Neurological factors: Conditions like Parkinson’s, MS, or even a past traumatic brain injury (TBI) can affect your balance and cognitive processing. Under the stress of a DUI investigation, these issues are often magnified, leading an officer to misinterpret a neurological tremor as “intoxication jitters.”
Under NHTSA’s own guidelines, SFSTs lose their validity when they aren’t performed on a level, dry, and well-lit surface. If you are 50 pounds overweight or over the age of 65, the tests are already statistically biased against you.
Need to Prove a Failed Test Is the Result of a Medical Condition?
A DUI arrest is an opinion, not a fact. If the State is basing its entire case on your inability to stand on one leg, they are betting on a jury being uninformed about your medical history.
At Drew Fritsch Law Firm, P.A., we subpoena the dashcam and bodycam footage to show the jury that you were being asked to perform a “circus act” on a sloped shoulder of the road while being blinded by blue and red strobes.
If you have been charged with a DUI and believe your “failed” sobriety tests were actually the result of a medical condition, do not accept a plea deal without a fight.
Contact Drew Fritsch Law Firm, P.A. today at 941.205.3535 for a confidential consultation.
Based in Punta Gorda, Drew Fritsch Law Firm, P.A. also provides criminal defense services throughout Charlotte, Lee, Collier, and Sarasota Counties.
Source:
leg.state.fl.us/statutes/index.cfm?App_mode=Display_Statute&URL=0300-0399/0316/Sections/0316.193.html
