Pro-tip: If there's any question whether it was rape?
Yes, it was. There can be no doubt of Consent. Without consent, clear, and emphatic, there's a word for that, and he used it, showing childporn to his friends.
No mention of that? Okay, let's clear the charges of Rape, despite the excited utterance confession, in writing.
She's 16. He recorded it, and distributed it to other kids, under age. Just not going to bring up those statutes? He's straight up guilty of production, possession, AND distribution of child pornography, by Federal statutes. All 3 Felonies, they can call the FBI now.