People often believe that pulling over and sleeping it off protects them from a DUI. In California the answer is not so simple. You can be charged, but the prosecution faces a real hurdle, and that hurdle is often where the case is won.
California requires proof of driving
Unlike some states, California does not have an actual physical control law. To convict you of a DUI, the prosecution must prove that you actually drove the vehicle while under the influence. Sitting or sleeping in a parked car, even in the driver's seat with the keys in the ignition, is not itself driving. The state has to prove movement of the vehicle while you were impaired.
How the prosecution tries to prove it
When an officer finds someone asleep in a car, the state builds a circumstantial case: a warm hood or engine, the car's position in a traffic lane or away from where the person lives, statements the person made, and witness accounts of driving. Each of these can be weak. A car parked legally, an engine that was running only for heat, and the absence of any witness to driving all undercut the case.
Why timing matters
Even if some driving can be shown, the prosecution must connect the impairment to the time of driving, not just the time the officer arrived. If you drank after parking, or if hours passed, the rising blood alcohol issue and the timeline become central.
Where to start
Sleeping-in-the-car cases turn on whether the state can prove you actually drove while impaired, which is frequently contestable. Use the free written case analysis below or call me directly. See also the no-driving defense and rising blood alcohol.