From the source article:
"In a similar case back in January, police encountered a man asleep behind the wheel of a Tesla car on the San Francisco–Oakland Bay Bridge. When police woke him up, he insisted that everything was fine because his vehicle was "on autopilot." Unfortunately for him, there's no autopilot exception to drunk-driving laws."
Pulled over for "driving under the influence" (of, presumably, alcohol)?
If he hadn't been drinking, he should have demanded an on-the-spot breathalyzer test.