I will state it, too.
If your 23 year old friend was having sex with a 14 year old...he will face charges of Statutory Rape. Even if she said "yes", she was not of age to legally consent to sex.
He can plan on Prison time. He can plan on spending the rest of his life on the Sex Offender Registry.
If, for example, the girl lied about her age...it doesn't matter. It was up to him to verify her age.
Best advice you can give your friend now is to get himself a Criminal Defense Attorney. And in the meantime, stay far away from the girl. If he even sees her at WalMart, leave the store immediately.

