The discussion first distinguishes between using and selling in the marketing of marijuana and heroin, followed by a review of the structure of the cocaine industry. The latter addresses production, export, distribution, and money processing. The examination of a court case involving the charge of possession of marijuana for sale or distribution focuses on the constitutionality of a statutory provision that mandates conviction for sale and distribution based solely on evidence as to the quantity of a drug possessed. Another case considered pertains to whether joint purchasers and possessors of a controlled substance who intend to share it between themselves as users may also be guilty of possession with intent to distribute. Among the issues considered in the charge of selling a controlled substance is the New York rule that one who acts solely as the agent of a purchaser of narcotics cannot be convicted of the criminal sale of a controlled substance. Other cases considered pertain to issues in aggravated drug sales, sale to minors, attempted and counterfeit sales, cultivation and manufacture, transportation and forfeiture, lesser-included offenses and multiple convictions, Federal and State prosecutions, conspiracy, and smuggling.