Amid 420 Festivities, Officials Warn of Dangerous Black Market Marijuana

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Saturday, April 20th
Crowds gathered Saturday afternoon at San Francisco's Golden Gate Park for 420, the unofficial annual marijuana celebration.

But while that celebration got under way, officials issued new warnings against buying marijuana from people at the park or on the street on fears that it may be laced with other drugs.

For more on how the marijuana market is maturing just over a year after legalization KCBS anchor Scott Lettieri spoke with David Downs, California Editor at, a cannabis news site.