Two years ago, Christian Hageseth logged on to the Internet in Colorado and prescribed anti-depressant drugs to a Menlo Park, Calif., teenager with a history of mental illness and alcohol abuse. A few months later, 19-year-old John McKay killed himself in his family home.

Upon learning that Hageseth had treated McKay, and that he didn’t have a license in California, state medical investigators urged local prosecutors to charge him with a felony. Last year they did, accusing him of practicing without a California license. The maximum penalty, according to the prosecution, would be three years in state prison and state fines.