Gebardi v. United States

The Mann Act punished a person who transports a woman in interstate commerce, causes her to be transported, or aids or assists another in obtaining or providing that transportation for prohibited purposes. Its structure distinguishes the transporter from the woman transported; it does not make her criminally liable simply for transporting herself.

The Act expressly reaches transportation whether the woman consents or not. Because Congress plainly anticipated that many prohibited trips would be voluntary, the woman's consent cannot itself be treated as the statutory “aid or assistance” that triggers criminal liability.

United States v. Holte did not compel a different result. Holte left open the possibility that a woman could be liable in exceptional circumstances, such as where she actively planned and carried out the trip, bought the tickets, or otherwise served as the moving force behind the transportation. Here, however, the evidence showed only willing acquiescence, not active assistance.

A person can sometimes conspire to commit an offense even if that person could not independently commit the substantive crime. Conspiracy law targets the special danger of collective criminal planning, and one conspirator may agree that another will do what the first cannot lawfully do alone.

But the agreement charged here was not merely an agreement between an able offender and someone legally incapable of committing the offense. The woman's agreement to travel was an inherent feature of the voluntary transportation that the Mann Act specifically contemplated, yet Congress did not make that participation criminal.

The Court read this omission as an affirmative legislative policy to leave a voluntarily transported woman's mere acquiescence unpunished. Construing the preexisting general conspiracy statute to punish that same acquiescence would defeat the immunity implied by the more specific Mann Act.

The Court did not rest its decision on the rule that an agreement cannot be separately punished as conspiracy when cooperative conduct by the same two people is indispensable to the substantive offense. The Mann Act can also be violated through force or intimidation, without the woman's cooperation. Instead, the decisive point was Congress's choice not to punish the consenting woman's role in voluntary transportation.

Because the woman was not a conspirator on this evidence, and the government produced no evidence that the man conspired with anyone else, there was no two-person conspiracy. Both convictions therefore had to be reversed.