Phoenix DUI Attorney Aaron Black on Marijuana Impairment

by Aaron M. Black • June 21, 2021

Marijuana DUIThe legalization of possessing and consuming marijuana is unveiling issues of proving impaired driving by consuming marijuana. In this new dynamic, it turns out that we criminal defense attorneys and prosecutors agree that DUI’s involving marijuana are problematic.

The East Valley. Tribune Managing Editor Tom Scanlon tackled this issue in June by asking Mesa Assistant City Prosecutor Stacey Good, Mesa Police Officer and Drug Evaluation Classification Program’s state coordinator George Chwe, and myself to discuss increasing DUIs involving marijuana.

We are seeing an uptick in marijuana DUI cases and an accelerating police effort to train officers in how to spot an alleged marijuana DUI. There is not yet a device that can detect the level of marijuana impairment but researchers are trying to develop a way to do that.

As of now, Good agreed with prosecutors and criminal defense attorneys that marijuana does not affect individuals in the same way and impairment is hard to prove. Unlike alcohol with its specific percentage of blood-alcohol concentration (BAC), there are no legal standards to apply to marijuana impairment.

Unlike alcohol, marijuana can stay in the user’s system for days and sometimes weeks. Studies are showing that chronic users of marijuana may show no signs of impairment at all.

A blood test will only show that THC (Tetrahydrocannabinol), the active ingredient in marijuana, is present. A driver is not required to have blood taken, but those who refuse will have their driver’s license suspended for a year and the blood can be taken anyway by obtaining a search warrant. THC negatively affects reaction time, motor coordination and completing complex tasks.

What law enforcement does have is the police interview with the suspected impaired driver that includes asking, “When is the last time you smoked marijuana,” said officer Chwe. The main test of marijuana impairment is how the driver responds to the questioning and to the field sobriety test. More documentation supporting what the officer observes is needed, he said.

The first act an officer makes is asking the driver to submit to a field sobriety test, but the officer cannot require the driver to take these series of coordination tests. I do not think these tests are indicative of a person being impaired by marijuana, I told the interviewer.

Here is other important legal information related to a marijuana DUI charge that the media discussion could not include:

Special drug recognition officers

Arizona has a long-standing cadre of law officers who are extensively trained in how to recognize marijuana and drug impairment, called Drug Recognition Experts (DRE). This effort is, in part, funded by the successful decriminalization of marijuana initiative. The training is extensive and some of these officers are certified phlebotomists so they can draw blood at the scene for testing.

Their training is a three-phase program totaling 88 hours of instruction. First is the pre-school for learning evaluation techniques, procedures and strategies. Second is instruction in how to make evaluations, and third is the field certification process under a DRE supervisor.

These DRE officers are few in number but they can respond to the scene of a traffic stop in a short time. I expect more DRE officers will be added.

Slightest degree doctrine

Arizona has a no tolerance policy for impaired drivers. Anyone who is impaired to the “slightest degree” can be arrested. It is a vague term and decided by the investigating officer making the traffic stop.

Actual physical control

 A person does not need to be driving to be arrested for a marijuana DUI. He or she can be sleeping in the back seat with the keys in a pocket, in the ignition, or some other scenario that comprises Arizona’s actual physical control law. If the keys were in the trunk, this law does not apply.

Lower courts have grappled with it. The law does not give definitions and that became a contentious area of DUI law. The lower courts are dealing with what the term means as they apply case law and the fact pattern of a case.

Penalties for Marijuana DUI

Arizona law allows the punishments for a misdemeanor marijuana DUI are the same as they are for alcohol impairment.

The range of incarceration for the defendant if convicted will be jail custody for at least one day and up to six months. The law allows for a minimum of 10 days in jail, but nine of those days will be suspended if the defendant completes a drug abuse class. Home detention is possible if the sentence is longer than one day.

Financial penalties are fines, surcharges, and other fees, including $500 for the prison fund, can total as much as $1,510.50.

Beyond those penalties, the privilege to drive after a drug conviction can be revoked for one year.

The conviction for a marijuana DUI also will mean a criminal record that can mean difficulty getting or keeping a job.

Associated injury or death

If someone is hurt or killed as a result of marijuana impairment, the charge is elevated to a felony with much harsher punishments and life changing restrictions.

Marijuana DUI defenses

Marijuana DUI DefensesThese traditional defenses are allowed by law:
  • The arresting officer did not have sufficient probable cause or reasonable suspicion to make the traffic stop.
  • The officer did not recite your constitutional rights to remain silent and to have an attorney during interrogation, called Mirandizing.
  • The blood test result was inaccurate or the blood sample was not properly stored and became tainted.
  • There was insufficient evidence of actual impairment even to the slightest degree.
Other defenses may be available depending upon the fact pattern of the case.

Start your defense at the traffic stop

Your defense begins at the traffic stop. Anything you say becomes evidence, no matter how innocent the statement appears to be. It is important to invoke your constitutional rights to prevent convicting yourself. The officer has to recite these rights at the arrest anyway, so it is best to use them from the start.

Protect your rights

The difficulty is using marijuana in the evening and getting pulled over the next morning, so it is crucial to have a skilled DUI defense attorney, such as myself, at your side through it all beginning at the earliest possible moment. Right now I recommend if you need to drive, do not use marijuana.

Aaron M. Black law has a history of helping good people in bad situations with the goal of winning a dismissal of the charge or reducing a first-time marijuana DUI to reckless driving.
Throughout your case, you will receive personalized service and always will be talking directly with me, not ushered off to a paralegal.

Begin defending yourself by calling for an appointment at 480-729-1683 at any time day or night, weekends or holidays, and I will respond promptly unless I am in court or at trial. Or use my online contact form.

Why Use Aaron M. Black

For the 8th consecutive year, I am named a 2021 DUI Super Lawyer in Phoenix.

The National Association of Distinguished Counsel places me in the top one percent of the finest lawyers in the nation.

The National Trial Lawyers Association rates me among the top 100 trial lawyers in the U.S. Learn more about my education and experience as a Phoenix Criminal Defense Attorney here.


About the Author

Aaron Black Phoenix DUI LawyerAaron Black is the founder and sole attorney of the Law Office of Aaron Black. Located in Phoenix, Arizona, his DUI and criminal defense law firm provides legal services to people who have received felony or misdemeanor charges from the state.

Aaron has developed a strong interest in defending people who have been arrested and received criminal charges for driving under the influence. With his professionalism and knowledge of Arizona DUI and criminal law, he has acted as a check and balance on the police, prosecution and courts and has protected a great number of his clients from excessive and unfair sentencing.

Along with DUI defense, Aaron handles a range of other criminal defense matters, including aggravated assault, burglary, domestic violence, drug possession, drug trafficking, fraud defense, insurance fraud, sex crimes, and white-collar crime cases.

After graduating college in 2003 from the University of Arizona, Aaron decided to pursue a law degree. He followed a family long tradition and went to the University of South Dakota School of Law where he pursued his goal of becoming a criminal defense lawyer.

After passing the Arizona and South Dakota bar exams, Aaron joined the Maricopa County Office of the Public Defender where he defended hundreds of people charged with serious criminal offenses. His work as a public defender helped him sharpen his litigation skills and gave him a unique insight into the Arizona criminal justice system.

Over the course of his 15-year legal career, Aaron has spent a considerable amount of time in both Arizona justice, municipal, state and federal courts. He has argued over 50 jury trials, tried over 100 bench trials and has become one of the highest-rated criminal and DUI defense attorneys in Phoenix and the surrounding areas. He has received a 10/10 rating from the legal directory Avvo because of his legal background and successful case record. Since 2014, he has received the Super Lawyer rating for his work as a Phoenix DUI Attorney and criminal defense attorney.

You can review Aaron’s Attorney Bio page for more information about his background, education and experience as a Phoenix DUI and criminal defense attorney.
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