There is a new law that punishes people who solicit sex from minors via the internet.

A legal question may be if 16 is an age of consent that should apply here, or is it 18, or 21 the drinking and voting age?

States vary from 14 to 18 for legal marriage.

The other legal question is if Foley broke the law.

Not being a lawyer or an FBI agent I do not have the answers.