Can You Get a DUI for Sleeping in Your Car in Arizona?
Arizona DUI Law: More Than Just Driving
Under Arizona Revised Statutes § 28-1381, a person can be charged with DUI not only for driving while impaired, but also for being in actual physical control of a vehicle while under the influence. The law does not require the car to be moving. This means an officer can arrest you even if you are parked and the vehicle is stationary.
The key question is always this: were you actually in physical control of the vehicle, or were you simply using it as a place to stay — what courts call a “stationary shelter”?
“It is reasonable to allow a driver, when he believes his driving is impaired, to pull completely off the highway, turn the key off and sleep until he is sober, without fear of being arrested for being in control.”
— Arizona Supreme Court, State v. Love (1995), quoted with approval in State v. Tarr (Ariz. Ct. App. 2014)
The Stationary Shelter Defense in Arizona
Arizona courts have clearly recognized that an intoxicated person may use a vehicle as a stationary shelter without committing a DUI. The Arizona Supreme Court established this principle in State v. Love (1995), drawing a clear line between someone who is using a car as shelter and someone who poses a real threat to public safety through present or imminent control of the vehicle.
This distinction was reaffirmed in a 2014 appellate opinion, State v. Tarr, decided by the Arizona Court of Appeals, Division One. That case provides a valuable window into how Arizona law treats this exact situation.
📋 Case Summary: State v. Tarr, 1 CA-CR 12-0791 (Ariz. Ct. App. 2014)
- What happened:
- Kenneth Tarr was found by Phoenix police officers in the driver’s seat of a parked car, engine running, with a BAC of .224%. He testified he had slept in the car after a fight with his girlfriend, having started the engine for heat.
- Charge:
- Four counts of aggravated DUI based on driving and actual physical control while impaired.
- Defense argument:
- Tarr asked for a jury instruction telling jurors they should consider whether he was merely using the vehicle as “stationary shelter” rather than exercising actual physical control.
- Court’s ruling:
- The Court of Appeals affirmed his conviction, but confirmed that the stationary shelter defense is valid Arizona law. The court agreed Tarr’s requested instruction was a correct statement of the law — the trial court just found that the standard instruction already adequately covered the concept.
The takeaway for Arizonans is important: the stationary shelter concept is firmly embedded in Arizona DUI law. Whether a jury applies it in your favor depends heavily on the specific facts of your situation.
What Factors Do Arizona Courts Consider?
Because Arizona has no bright-line rule, juries must weigh the totality of the circumstances to determine whether a person was in actual physical control. The Arizona Supreme Court outlined the relevant factors in State v. Zaragoza (2009), and they were reinforced in Tarr:
Factors Arizona Juries Weigh in “Actual Physical Control” Cases
- Whether the vehicle’s engine was running
- Whether the ignition was on and where the key was located
- Where the driver was seated and in what position
- Whether the person was awake or asleep
- Whether the vehicle’s headlights were on
- Where the vehicle was parked or stopped
- Whether the driver had voluntarily pulled off the road
- Time of day and weather conditions
- Whether the heater or air conditioning was on
- Whether windows were up or down
- Any explanation the driver gave for being in the vehicle
No single factor is automatically decisive. A running engine, for example, raises concern — but courts have recognized that someone may run the engine for heat or air conditioning without intending to drive. The jury looks at the full picture.
The Critical Question: Were You a Threat to the Public?
Under both Love and Zaragoza, the central inquiry for the jury is whether you “actually posed a threat to the public by the exercise of present or imminent control” over the vehicle while impaired.
If you pulled off the road, parked safely, turned off the engine, and climbed into the back seat to sleep, a strong argument exists that you were not in actual physical control. On the other hand, if officers observed you moving the vehicle, found you in the driver’s seat with the engine running in traffic, or had evidence you recently drove to your location while intoxicated, the outcome may be very different.
It is also worth noting: Arizona courts have held that even if you relinquish actual physical control, if evidence shows you drove while intoxicated to reach the location where you were found, that driving alone can support a DUI conviction.
What This Means for You Across Arizona
Whether you were arrested in Phoenix, Tucson, Mesa, Scottsdale, Tempe, Flagstaff, or anywhere else in Arizona, the same statewide DUI statutes and case law apply. A sleeping-in-car DUI charge is not an automatic conviction. The stationary shelter doctrine gives Arizona juries the legal basis to distinguish between responsible behavior — choosing not to drive drunk — and genuine public danger.
However, the defense is fact-specific and must be properly raised and argued. How the facts are presented at trial, how the jury instruction is framed, and how closing arguments are structured all matter significantly, as the Tarr case itself demonstrates.
Frequently Asked Questions
Does the engine have to be off for the stationary shelter defense to work?
Not necessarily. While a running engine is a factor that weighs against you, it is not automatically disqualifying. Courts look at all circumstances together. Tarr’s engine was running for heat, and the Court of Appeals still affirmed that the stationary shelter concept applied as a legal defense — though the jury ultimately convicted based on other evidence, including observed movement of the vehicle.
Does it matter where in the car I was sitting?
Yes. Being in the driver’s seat with keys accessible makes it easier for a jury to conclude you could take control at any moment. Being asleep in the back seat, away from the controls, is a stronger factual basis for a stationary shelter argument.
Can the prosecution use evidence that I drove to my location while drunk?
Yes. Even if you are found in a parked car, Arizona courts have held that evidence of prior impaired driving to reach that location can independently support a DUI conviction. This is an important reason to consult an attorney as soon as possible after an arrest.
Is this defense available for aggravated DUI charges?
Yes. The “actual physical control” element applies to both standard and aggravated DUI charges under Arizona law. In Tarr, the charges were aggravated DUI, and the stationary shelter defense was still a valid argument for the jury to consider.
Arrested for DUI in Arizona? Let’s Talk.
If you or a loved one was arrested for DUI while sleeping or sitting in a parked car anywhere in Arizona, you may have a defense. With 47 years of DUI defense experience, Gordon Thompson can review the facts of your case and explain your options — at no charge for the initial consultation.
