Assuming that any of that unverifiable story is true, he is an ignorant or dishonest quack. California law provides for recommendations, not prescriptions.
I believe the 9th Circuit was wrong (that's a first, huh?). Certainly the doctor may discuss the pros and cons of smoked marijuana as medicine with his patient. He does have that first amendment right. He may even document that conversation into the patient file.
But if he allows the patient to make a copy of that recommendation knowing it will be used to acquire marijuana, or if it was found later that it was used to acquire marijuana, the doctor is indeed guilty of aiding and abetting the violation of federal law. Without a copy of that written recommendation the patient would not have been able to acquire the marijuana.
For a doctor to plead ignorance, saying he had no idea why the patient wanted a copy of the recommendation or saying that he had no idea that it would actually be used to acquire marijuana is ludicrous.
Yet the court ruled, "Holding doctors responsible for whatever conduct the doctor could anticipate a patient might engage in after leaving the doctor's office is simply beyond the scope of either conspiracy or aiding and abetting."
Yeah, right. But we'll hold bartenders responsible for their customers, won't we? Sell a gun to a felon that he later uses to kill someone and see if your actions are "beyond the scope of either conspiracy or aiding and abetting."
But doctors get a pass because they can't anticipate that the patient will use that recommendation to acquire marijuana? That's bull$hit. That's nothing more than a wink-wink, nudge-nudge mockery of the law.