A news release from the U.S. attorney for Western Pennsylvania says that on Feb. 14, 2011, Yon Park "caused an individual to be transported in interstate or foreign commerce" to engage in prostitution," according to the report.
The charge relates to a health spa in Johnstown, Pa.
Park's husband, Steve Park, pleaded guilty to a federal money laundering charge.
Sentencing for the couple will be in February 2014. Yon Park faces a 10 year prison term, and Steve Park faces a 20-year sentence. Also, both could be fined.