What Defenses Are Available for DUI Cases in Arizona?

Contrary to popular belief, a driving while under the influence (DUI) charge in Arizona doesn’t automatically lead to a conviction. These cases can be successfully challenged, and finding weaknesses in the state’s evidence can lead to reduced charges or even a dismissal. Please continue reading and consult with a knowledgeable Tempe Regular DUI Lawyer to understand the defenses that may be available depending on the unique circumstances of your case.   

What Does the Prosecutor Have to Prove in a DUI Case?

For a DUI conviction, the prosecutor must prove several elements beyond a reasonable doubt. Essentially, they must demonstrate that you were in actual physical control of a vehicle and that you were impaired while doing so. Impairment can be established if you were “impaired ot the slightest degree” due to drugs or alcohol, or if you had an illegal blood alcohol concentration (BAC). Understanding these key elements is essential for crafting a strong defense, as any weaknesses in the prosecution’s ability to prove these points can lead to the charges being dropped or a favorable plea deal. 

Beyond proving the core elements of control and impairment, the prosecutor must also present compelling evidence to support the charge. This evidence typically includes testimony from the arresting officer about the defendant’s driving, performance on field sobriety tests, and observations of physical signs of intoxication like slurred speech or bloodshot eyes. Additionally, evidence often includes the results of chemical tests, which provide BAC or the presence of controlled substances. 

At The Weingart Frim, PLLC, our legal team is prepared to closely scrutinize the methods used to collect, store, and test this evidence, as any procedural errors or constitutional violations could result in the suppression of evidence, making it much harsher for the prosecution ot meet its burden of proof. 

What Legal Defenses Apply to Arizona DUI Charges?

To build a strong defense against DUI charges in Arizona often involves challenging the state’s evidence and procedures used by law enforcement. Common defenses include: 

• Challenging the Initial Stop: Arguing the police lacked the necessary reasonable suspicion or probable cause to conduct a traffic stop. 
• Improper Field Sobriety Tests (FSTs): Questioning the officer’s administration of FSTs due to poor conditions, improper instructions, or medical factors affecting performance. 
• Contesting Chemical Testing: Introducing evidence of device malfunction, operator error, medical conditions, or chain of custody issues that compromise the reliability of chemical test results. 
• Constitutional Violations: Asserting that your rights were violated, such as an illegal search and seizure or failure to issue Miranda warnings (if necessary). 
• Lack of Actual Physical Control: Arguing that you were not operating the vehicle or intended to operate it. 
• Alternative Explanations: Presenting factors like fatigue, illness, or prescription medications could explain the signs of impairment, rather than alcohol or drugs. 
• Rising BAC: Using expert testimony to show that BAC was below the legal limit at the time of driving, but rose afterward.  

Depending on the unique circumstances of your case, several defense strategies may be employed. At The Weingart Firm, PLLC, we are prepared to help you build a strong defense and protect your future. Connect with us today to schedule a free consultation.