It is a federal crime to transport someone between states or in foreign commerce for reasons of prostitution or any other reason that is immoral. Laws vary from state to state, but those involved in providing sexual services, as well as the customer asking for them, could face criminal charges. Anyone acting as a broker between the two may be charged with pandering or pimping.
Prostitution forms vary from escort services or call-girls to brothels and streetwalkers. Under prostitution laws, most states consider that a crime has been committed once a person has agreed to provide sexual services in exchange for money, and that person could be arrested for prostitution. The customer who is soliciting the service may be charged with solicitation of prostitution.
Whether the crime is committed or not, as soon as the person soliciting the prostitute takes any action, such as withdrawing money, which shows an intent to follow through with the agreement to pay for sex, that person could be charged with a sex crime. Solicitation of prostitution to a minor makes a solicitation charge more serious and could turn a misdemeanor charge into a felony charge.
A person who has been arrested for a sex crime, such as prostitution, sexual solicitation through the Internet or other type of related offense, may want to meet with a criminal defense attorney as soon as possible. The attorney can review the evidence in order to determine the appropriate strategy to employ, which in some cases might be attempting to show that the defendant was illegally entrapped by the arresting authorities.
Source: FindLaw, "Prostitution", accessed on Dec. 11, 2015