Good job. So what did he do to attract their attention? When he was asked on a customs questionnaire his purpose for entry in the U.S., did he answer: "To have sex with underaged girls in Mexico.?"
He was probably making arrangements over the Internet.
You often read news stories about how these pedophiles hook up with some under-aged girl only to find out that the object of their lust was a bald, fat, cigar-chomping middle-aged undercover police officer. :-)