Officials say two Chinese nationals were found guilty of promoting prostitution and organized crime at massage parlors in Columbus, Worthington and Powell.
Sisters 57-year-old Qing Xu and 55-year-old Estella Xu were each convicted of engaging in corrupt activity, money laundering, practicing medicine without a license and nine counts of promoting prostitution.
The sisters must forfeit two sport utility vehicles and more than $20,000.
Prosecutors say the sisters lured workers with promises of high-paying massage jobs. Instead, they say employees were forced to work 12 hour days, sleep on massage tables and serve men expecting sexual contact.
Prosecutors say masseuses were given large tips for $120 massages, which amounted to sex for hire.
Sentencing is scheduled for Oct. 16. The mandatory sentence is at least five years in prison.
