Six years in prison.
Spoilers. Although if you haven't learned anything in the last (15 years?) of IMDB its, don't come to the forums if you haven't seen the movie yet.
The more I dwell on that fact the more frustrated I seem to get. That appears to me like an exceptional amount of time to serve in a prison for a non violent crime that essentially is glorified lying. Frame it any way, add any title you want to that crime, but it really seems like advanced lying. Is that prison worthy? Even if that act of lying emotionally traumatized someone, the act of traumatizing someone in a non physical way isn't prison worth by nature, correct? Maybe you can sue the thief at most.
Calling it "Stealing identity" seems to heighten the crime just by the name alone, "identity theft" Well I've always associated identity theft with actual harm. Such as stealing credit, although that's not a violent crime it indeed will have drastic effects on your life. Getting a mortgage, buying a car, getting a job. I know that he has impersonated people most of his early life and im sure it would have emotionally hurt the family members, but again I can't see going to jail for any of this. I think maybe Im missing a deeper crime here, maybe there was indeed money involved. I see a case where one could say he cost tax payers a lot of money with his charade, the money he cost in legal expensive, wasting government time and money while he was impersonating various children. Although I believe instead the professional agents should have been held accountable for letting him impersonate a 16 year old. Clearly they weren't doing the basics of their job.