What follows is an opinion from a United States Court of Appeals.
Your task is to identify the issue in the case, that is, the social and/or political context of the litigation in which more purely legal issues are argued. Put somewhat differently, this field identifies the nature of the conflict between the litigants. The focus here is on the subject matter of the controversy rather than its legal basis.
Your task is to determine the specific issue in the case within the broad category of "criminal - federal offense".

Opinion:
UNITED STATES of America, Appellee, v. Marvin Leroy FREEMAN, Appellant.
No. 222, Docket 29460.
United States Court of Appeals Second Circuit.
Argued Jan. 27, 1966.
Decided Feb. 7, 1966.
Gerald M. Gallivan, Asst. U. S. Atty., for Western District of New York (John T. Curtin, U. S. Atty., on the brief), for appellee.
Michael Hertzberg, New York City (Anthony M. Marra, New York City, on the brief), for appellant.
Before FRIENDLY and HAYS, Circuit Judges, and BLUMENFELD, District Judge.
Of the District Court for Connecticut, sitting by designation.
PER CURIAM:
Appellant’s attorney conceded at oral argument that appellant had transported Esther “Billie” Hawkins from Pittsburgh, Pennsylvania to Buffalo, New York, and that shortly after she arrived in Buffalo Miss Hawkins engaged in acts of prostitution, the proceeds of which were shared with appellant. The sole question raised on appeal is whether there was substantial evidence presented to the jury to support a finding that appellant possessed the requisite intent, at the time that he transported Miss Hawkins.
Miss Hawkins testified that she had previously “worked for the defendant.” After appellant transported her to Buffalo, the former relationship was resumed. Freeman was in the car with Esther Hawkins when she solicited a Buffalo detective.
We hold that there was sufficient evidence to sustain the jury’s finding.
Affirmed.

Question: What is the specific issue in the case within the general category of "criminal - federal offense"?

Choices:
murder
rape
arson
aggravated assault
robbery
burglary
auto theft
larceny (over $50)
other violent crimes
narcotics
alcohol related crimes, prohibition
tax fraud
firearm violations
morals charges (e.g., gambling, prostitution, obscenity)
criminal violations of government regulations of business
other white collar crime (involving no force or threat of force; e.g., embezzlement, computer fraud,bribery)
other crimes
federal offense, but specific crime not ascertained

Answer: 13