CBS Evening News | Synthetic drugs can be just as dangerous and addictive as their illegal counterparts, and since there are so many new synthetic drugs, scientists can't identify them

Part of the appeal of many synthetic drugs is that they’re legal and easy to get. But the substances can be just as dangerous and addictive as their illegal counterparts, and since there are so many new synthetic drugs, scientists can't identify them. Holly Williams reports. Air Date: Dec 18, 2013