Cardenas was pimping a 17 year old and an 18 year old. He got caught when the 18 year old got arrested, and was convicted of pimping an adult, pimping a child, pandering a child, inducing child prostitution, and trafficking in children.
On appeal, his conviction for trafficking in children was reversed, because that statute prohibits the sale or lease of a child, but not of a child's services. Given that he wasn't selling the girl into slavery, the statute doesn't quite apply. His other convictions were affirmed.