The retrial of marijuana advocate Ed Rosenthal is underway in San Francisco.
The self-described "Guru of Ganja" is being retried in federal court on five charges of marijuana cultivation and distribution.
During opening statements this morning, the prosecution described Rosenthal as a person who ran a major marijuana growing operation out of his home and a warehouse in Oakland.
But Rosenthal's defense lawyer countered by saying he was a prominent scientist and medical marijuana advocate.
After both sides were finished with opening statements, the government called a Drug Enforcement Agent as its first witness. The agent is the first of more than 40 witnesses expected to be called by federal prosecutors.
(Copyright 2007 by The Associated Press. All Rights Reserved.)