Page "Mann Act" Paragraph 3

The first person prosecuted under the act was African-American heavyweight boxing champion Jack Johnson.

He had had an interracial affair with a white prostitute named Lucille Cameron, but she refused to cooperate with the prosecution ; Johnson later married her.

Less than a month later, he was re-arrested for having crossed a state line, before the Mann Act was passed, with Belle Schreiber, a prostitute who had left a brothel.

She testified against him, and Johnson was convicted and sentenced to the maximum penalty of a year and a day in prison.