Madison BAC Test Defense Lawyer
Madison BAC Test Defense Lawyer for OWI Breath and Blood Results
A breath or blood number can feel impossible to fight, but BAC evidence still has to be lawfully obtained, properly handled, and meaningfully connected to driving. Attorney Glenn E. Avena reviews the testing process.
BAC Evidence
Breath and Blood Tests Can Be Challenged
Many OWI clients believe the case is over because police have a BAC result. That is not always true. Breath and blood testing involve legal procedure, timing, equipment, human decisions, documentation, and scientific assumptions. A BAC number should be reviewed, not blindly accepted.
Attorney Glenn E. Avena can examine whether police had lawful grounds for the stop and arrest, whether the requested test was handled properly, whether observation periods were followed, whether blood draw and lab handling were appropriate, and whether the test result proves what the government says it proves.
Testing Issues
What a Madison BAC Defense Lawyer Reviews
Timing
The time between driving, stop, arrest, and testing can affect how evidence is interpreted.
Procedure
Observation, instructions, calibration, blood draw, and lab procedures can all matter.
Admissibility
The defense may review whether the result can be used and how strongly it proves the charge.
Testing Defense
A BAC Number Is Evidence, Not the Whole Story
Breath and blood results often become the center of an OWI case, but they do not erase every other issue. Police still need a lawful stop and arrest. The test still needs to be obtained and handled properly. The timing still needs to make sense. The result still needs to prove what the government says it proves.
Attorney Glenn E. Avena can review whether the officer followed required procedures, whether the breath testing process was reliable, whether blood was drawn and handled correctly, whether lab documentation supports the result, and whether medical or timing issues affect interpretation. In some cases, the defense may also review whether a test result reflects alcohol concentration at the time of driving or at a later time.
Clients should keep all breath slips, blood draw paperwork, hospital or lab paperwork, citations, and any medical information that may matter. The earlier testing evidence is reviewed, the easier it is to identify missing records or procedural problems.
OWI Cluster Links
Related Madison OWI Defense Resources
Local Defense, Local Courts
Your case is heard here, by people who work here
Avena Law Office, LLC practices out of one Madison office and appears in the courthouses of Dane, Columbia, and the surrounding South-Central Wisconsin counties. Knowing the courtroom, the prosecutors, and how a county actually handles a charge is not a detail. It changes what can be negotiated.
Common Questions
Breath and Blood Test Questions in Wisconsin OWI Cases
Can a breath test be wrong in a Wisconsin OWI case?
Yes. A breath result depends on a properly maintained instrument, a trained operator, a completed observation period, and correct procedure. Medical conditions, mouth alcohol, and equipment records can all be examined. A number printed on a slip is evidence, not a verdict, and the defense can review calibration and maintenance records along with how the test was requested and administered.
What happens if I refuse a breath or blood test in Wisconsin?
Refusing the requested test after an OWI arrest starts a separate revocation process. You are served a Notice of Intent to Revoke, and you must request a refusal hearing in writing within 10 days under Wis. Stat. s. 343.305(9)(a)4. If you miss that deadline, the revocation generally takes effect without a hearing. A prior refusal can also count as a prior offense in a later case.
Does a high BAC increase the penalty for OWI in Wisconsin?
Yes. Under Wis. Stat. s. 346.65(2)(g), the fine is doubled at a result of 0.17, tripled at 0.20, and quadrupled at 0.25. The underlying range still depends on how many prior offenses you have. A first offense is a civil forfeiture of $150 to $300, while later offenses carry fines and jail time, so the test result is worth reviewing closely.
How long after I was driving can police test my blood in Wisconsin?
There is no single cutoff, but timing matters. Alcohol concentration changes over time, so a sample taken well after driving may not reflect what your level was behind the wheel. The gap between the stop, the arrest, and the draw is something the defense reviews, along with who drew the blood, how it was stored, and how the lab handled it.
What is a PAC charge, and how is it different from OWI in Wisconsin?
OWI means operating while under the influence, so it is about impairment. PAC, or prohibited alcohol concentration, is based purely on the test number reaching or passing the alcohol concentration limit that applies to you. Wisconsin commonly charges both counts from a single stop, in the alternative, and a conviction is normally entered on only one. Both still rest on evidence that can be challenged.
Is it worth hiring a lawyer in Madison if my BAC was over the limit?
It can be. A test result does not end the analysis. Police still need a lawful reason for the stop and the arrest, the sample still has to be taken and handled correctly, and the timing still has to make sense. Those issues are worth reviewing before you decide how to resolve the case. Avena Law Office offers a free consultation at 608.271.2271.
Free Consultation
Talk to a Madison BAC Test Defense Lawyer Today
If your case depends on a breath or blood result, get the testing reviewed.
Request a Free BAC Defense Consultation
Complete the form and Avena Law Office will review your request.