Whether the substantive offenses merged into the single conspiracy, preventing separate convictions and sentences for both conspiracy and the completed offenses.
Holding
No. Conspiracy and the substantive offenses committed in carrying it out are separate crimes, and Congress may authorize punishment for both.
Reasoning
Braverman v. United States did not control because it involved multiple conspiracy counts based on a single proven agreement, with no substantive offenses charged. Here, by contrast, the indictment and proof established both one conspiracy and completed substantive violations.
The common-law merger rule has little force in American criminal law. A conspiracy is not merely an incomplete version of the completed crime: it is an unlawful agreement with distinct elements and distinct dangers, including coordinated planning, secrecy, and the increased capacity for ongoing criminal conduct.
The Court recognized narrow exceptions, including situations in which the agreement necessary for conspiracy is wholly inherent in the substantive offense or where the substantive statute excludes a participant from conspiracy liability. But those limited exceptions did not apply to the Pinkertons' revenue-law violations.
The fact that some overt acts alleged to prove the conspiracy were also charged as substantive offenses did not create impermissible double punishment. The unlawful agreement remains a distinct offense from the later act that carries out the agreement.