Thirteen people face criminal charges related to prostitution or soliciting prostitutes, while eight other people are being held on suspected immigration violations. All of the suspects are Mexican nationals, according to St. George police. Miguel Estrada, the resident agent in charge for U.S. Immigration and Customs Enforcement investigations in St. George, said prostitutes were brought to St. George from Las Vegas. The sex was performed at the homes of the johns, Estrada said.

Estrada said his agency began investigating because they were worried the ring might have forced or coerced women into providing sex. But Estrada said there's no evidence of coercion and it appears the women were willing participants.

- Nate Carlisle