Robertson v. United States

affirming convictions where "single acts"--sales of five and three kilos of pure heroin--were to core members of conspiracy and of "such a magnitude as to justify an inference that each knew he was involved in a criminal enterprise of substantial scope" | affirming convictions where “single acts” — sales of five and three kilos of pure heroin — were to core members of conspiracy and of “such a magnitude as to justify an inference that each knew he was involved in a criminal enterprise of substantial scope” | Fourth Amendment not violated because defendant has no reasonable expectation of privacy | no special status accorded to co-conspirators or codefendants