A DUI attorney can challenge blood test results in Arizona when the draw, handling, labeling, storage, or testing of the sample does not comply with A.R.S. 28-1388(B) or (C). You can review the statute here: the statute here. Arizona prosecutes BAC cases at 0.08 for ordinary drivers, 0.04 for commercial drivers, and 0.02 for drivers under 21. A first standard DUI under A.R.S. 28-1381 carries at least 10 consecutive days in jail, a $1,250 minimum fine and assessment, and a 90-day MVD suspension. A second offense can mean 90 days in jail and over $3,000 in fines. Contact an Arizona DUI lawyer immediately to demand records and preserve the sample before Arizona’s notice deadlines and the criminal court sets hearings for a fast defense.
Can a DUI attorney challenge blood test results in Arizona?
Yes, a DUI attorney can challenge blood test results in Arizona by attacking the legality of the draw, the reliability of the lab process, and whether the State can prove the sample was properly collected and handled under A.R.S. 28-1388. That statute governs blood evidence, including access to blood samples and related procedures, and it matters in every DUI case where BAC is at issue.
A challenge may focus on whether the draw was done by an authorized person, whether the sample was preserved correctly, whether contamination or fermentation affected the result, or whether the records are incomplete. In a DUI case, the State still has to prove its numbers, and flaws in the blood evidence can weaken a charge built on 0.08, 0.04, or 0.02 BAC thresholds.
What blood-draw and chain-of-custody errors can be challenged?
Common challenges include an improper blood draw, missing documentation, broken chain of custody, mislabeled vials, delayed refrigeration, and lab handling problems that make the result less trustworthy. Arizona law expects the State to show where the blood came from, who handled it, and what happened before testing, especially when the sample is used to prove impairment or a prohibited BAC.
A.R.S. 28-1388 also gives defendants important rights related to blood evidence, including access issues and the ability to examine what the State relied on. If records are incomplete or the person drawing the blood was not authorized, the defense can use those gaps to argue the result should be discounted or excluded.
How does independent blood testing help your defense?
Independent blood testing can help by giving the defense its own scientific check on the State’s result, especially when the first test was close to the legal limit or the paperwork is suspicious. Under A.R.S. 28-1388, Arizona law recognizes the importance of blood evidence and the defense’s ability to review it, which is why fast action matters after an arrest.
A second analysis may reveal a different BAC, lab error, contamination, or a timing issue between driving and testing. If your defense team can compare the State’s sample handling with an independent review, it may uncover facts that support suppression, negotiation, or dismissal. For related help, see our Arizona DUI lawyer page.
How do DUI cases play out in local Arizona courts?
DUI cases in local Arizona courts usually begin with arraignment, then move through disclosure, motions, and settlement talks, and some cases proceed to trial. Arizona MVD can also move separately from the criminal case, so a driver may face both court dates and administrative license issues at the same time.
Oliverson Law has offices in Tempe, Gilbert, Phoenix, and Kingman, and represents clients in the courts near each location. If your case is in Maricopa County or nearby, our team regularly handles matters for people looking for a Phoenix DUI lawyer, Mesa DUI lawyer, or Chandler DUI lawyer. We also assist clients through local court processes with a Gilbert DUI lawyer.
When should you call a DUI lawyer?
You should call a DUI lawyer immediately after an arrest, because early steps can affect blood evidence, MVD deadlines, and whether the State can keep the case strong. A challenge dui blood test arizona strategy works best when counsel acts before records disappear, witnesses fade, or the defense loses access to the sample and lab data.
Oliverson Law provides DUI defense, but the firm also handles drug crime defense, assault defense, and broader criminal defense. If your arrest involved multiple allegations, such as a drug-related traffic stop or a related violence accusation, those issues may need to be addressed together right away.
What are the key Arizona DUI statutes and agencies?
The key Arizona DUI statute for blood evidence is A.R.S. 28-1388, and it works alongside the broader DUI provisions in A.R.S. 28-1381 and related statutes. Arizona MVD handles administrative license action, while Arizona courts handle the criminal case, so both the agency and the court process can affect your driving and record.
You can review A.R.S. 28-1388 at azleg.gov, check license issues through Arizona MVD, and look up court resources at Arizona Courts. For help from one team, see our Phoenix criminal defense lawyer page and our Arizona weapons charges lawyer page if your case includes related allegations.
Frequently Asked Questions
No. Arizona blood draws depend on the facts, the warrant process, and the applicable law. A defense lawyer can review whether the draw was lawful, whether consent was valid, and whether the sample can be challenged under A.R.S. 28-1388 and related DUI statutes.
Arizona DUI cases often involve 0.08 or more for standard drivers, 0.04 or more for commercial drivers, and 0.02 or more for drivers under 21. A lower BAC can still matter if the State alleges impairment, but the defense can challenge the reliability of the test.
Yes. Even approved labs can make mistakes with collection, labeling, storage, transport, or testing. A defense attorney can request records, review the chain of custody, and look for issues that undermine the reported BAC.
It can. A strong defense may help in the criminal case and may also affect administrative license issues through Arizona MVD. The sooner your lawyer acts, the better the chance of protecting both your court case and your driving privileges.
No. Waiting can make it harder to preserve blood evidence, obtain records, and respond to deadlines. Call a DUI lawyer as soon as possible so the defense can start reviewing the arrest, the draw, and the State’s test results.
If you need help now, contact Oliverson Law as soon as possible. We can review the blood draw, challenge the lab evidence, and protect your rights before deadlines pass.
