Thurgood Marshall

“ It was thus proper with regard to Count 1 for the trial judge to instruct the jurors in effect that if they found that Turner did indeed possess the drug, they could infer that the heroin had been illegally imported and impute knowledge of that fact to Turner. However, the instruction that possession is prima facie evidence of a violation of § 4704 (a) is quite different. It may be true that most persons who possess heroin have purchased it not in or from a stamped package. ”