Commercial Driver DUI Lawyer Tucson, AZ
Protect Your CDL. Protect Your Livelihood.
- Free, confidential consultations and flat attorney’s fees
- Certified specialist in criminal defense and DUI defense
- Aggressive, science-driven challenges to breath/blood tests
Why CDL DUI Cases Demand a Different Kind of Defense
If you drive for a living in Tucson or anywhere in Pima County, a DUI accusation can completely sideline your career. Arizona holds commercial drivers to a stricter standard. A blood alcohol concentration (BAC) of .04 while operating a commercial vehicle can trigger DUI charges, and a DUI in a personal vehicle can still lead to commercial driver's license (CDL) disqualification. Add zero tolerance on the part of employers and insurers, and the stakes are higher for CDL holders than almost anyone else on the road.
At St. Louis Huffman Law, we defend truck drivers, bus operators, and other commercial motorists with one goal: protect your license and your future.
What Sets St. Louis
Huffman Law Apart
for CDL Drivers in Tucson, AZ
- Meet with a lawyer, not a screener.
Your free consultation at St. Louis Huffman Law is attorney-to-client from minute one. - Certified firepower.
Joseph P. St. Louis is a certified specialist in criminal defense (State Bar of Arizona) and DUI defense (National College for DUI Defense). - Trial results that matter.
Our attorneys have more than 200 jury trials combined. Ryan Huffman set an office record with three straight DUI not-guilty verdicts in eight weeks (including a reported .213 BAC). - Former prosecutor insight.
Liz Farkas led the Vehicular Crimes Unit at the Pima County Attorney’s Office. She knows how these cases are built and how to dismantle them.
- Science that wins cases.
We don’t accept lab numbers at face value. Our team independently scrutinizes blood and breath testing, chain of custody, instrument maintenance, and method validation. - Experts on call.
We collaborate with a former state crime lab leader, medical experts, and accident reconstructionists to expose errors the report glosses over. - We don’t take the first offer.
Our Tucson DUI defense lawyers will work every angle of your case and keep pushing until your best outcome is on the table.
For a Brighter Future
"Mr. Huffman and the staff at the firm were highly professional, expedient, and clear in explaining issues relevant to the charges.
There has been a very reasonable resolution to the case within a fairly short timeframe that allows my family member a chance at a bright future, unencumbered by lasting issues. We highly recommend St. Louis Huffman Law."— Anthony, 5-Star Review
Flat Fees & Transparent Costs
St. Louis Huffman Law offers flat fees for most DUI matters. We will sometimes separate pretrial and trial phases, but many DUI cases are a single flat fee with no added trial fee. We collect trust money for out-of-pocket expenses (like experts, testing, and transcripts) and bill against it.
Our clients hire us because we put in the work, not because we’re the cheapest option. That investment often makes the difference.
What to Do Now (and What Not to Do)
- Call us immediately after a DUI arrest in Tucson or anywhere in Southern Arizona. Motor Vehicle Division hearing deadlines can be very short.
- Bring everything: citations, release paperwork, tow/impound info, receipts, and any video or photos you took.
- Write down your day: food, sleep, prescription medications, timing of stops and drinks, health issues, footwear, and conditions at the scene.
- Avoid discussing your case with anyone but your lawyer. Don’t message details to supervisors, post online, or reply to others’ posts.
FAQ for Our Commercial Driver DUI Lawyers in Tucson, AZ
What’s the BAC limit for CDL drivers?
A BAC of .04 can trigger DUI charges when operating a commercial vehicle. Separate employer and federal rules can be even stricter. If you’re in a non-commercial vehicle, standard DUI thresholds apply, but a DUI can still disqualify your CDL.
Can I keep driving while my case is pending?
Possibly. Criminal and MVD administrative processes run on different tracks with different timelines. Our attorneys will act fast to request hearings and pursue options that can keep you on the road legally.
I refused testing at the scene. Now what?
Arizona’s implied consent law can impose automatic license consequences for refusals, often harsher than a test result. We can challenge whether the officer properly advised you and whether a refusal actually occurred.
Will a plea end my career?
It depends on the specific charge and resolution. One of our priorities is negotiating outcomes that avoid CDL-disqualifying events whenever the facts support it.
More Questions?
“All charges against me dismissed”
“Highly recommend Mr. Huffman as a DWI defense lawyer. After an arduous legal battle, he was able to get all charges against me dismissed.”
— Rene, 5-Star Review
