From what I just quickly Googled:

1) Sixteen is the age of consent in Georgia;

2) Per Georgia Code 16-6-3 (a): A person commits the offense of statutory rape when he or she engages in sexual intercourse with any person under the age of 16 years and not his or her spouse, provided that no conviction shall be had for this offense on the unsupported testimony of the victim.

Per Georgia Code 16-6-3 (b): A person convicted of the offense of statutory rape shall be punished by imprisonment for not less than one nor more than 20 years; provided, however, that if the person so convicted is 21 years of age or older, such person shall be punished by imprisonment for not less than ten nor more than 20 years; provided, further, that if the victim is 14 or 15 years of age and the person so convicted is no more than three years older than the victim, such person shall be guilty of a misdemeanor.

Now I have no way of knowing whether or not thatt's the old law or the new law. (It's from a legal forum, posted 5/22/06.) But according to this, since the Boy was 17 and the Girl was 15, this should have been tried as a Misdemeanor. No Misdemeanor, even in Stalin's Gulags, ever carried a ten year sentence. Unless making the video had something to do with it.