In addition to its stated purpose of preventing human trafficking, the law was used to prosecute unlawful premarital, extramarital, and interracial relationships. The penalties would be applied to men whether or not the woman involved consented and, if she had consented, the woman could be considered an accessory to the offense. Some attribute enactment of the law to the case of world champion heavyweight boxer Jack Johnson. Johnson was known to be intimate with white women, some of whom he met at the fighting venue after his fights. In 1912 he was prosecuted, and later convicted, for "transporting women across state lines for immoral purposes" as a result of his relationship with a white prostitute named Belle Schreiber; the month prior to the prosecution, Johnson had been charged with violating the Mann Act due to traveling with his white girlfriend, Lucille Cameron, who refused to cooperate with the prosecution and whom he married soon thereafter.