UNITED STATES OF AMERICA v. DZUNG AHN PHAM
The Ninth Circuit affirmed the denial of a physician's motion to withdraw his guilty plea, ruling that his admission to knowingly issuing prescriptions outside the usual course of professional practice satisfied the mens rea requirement established in Ruan v. United States. The court held that Pham's explicit acknowledgment that he acted without a legitimate medical purpose inherently proved he knew he was unauthorized under the Controlled Substances Act.