I know there are some private schools that have agreements with community colleges. This allows the student to have dual enrollment and take college level credits while they are still in high school. I have not heard of completely graduating high school at 10 grade but I know students that have completed the equivalent of their associates degree by the end of 12th grade. Giving them an opportunity to complete their 4 year degree before they were 20.
I know that dual in enrollment agreements have been made between public schools and community colleges but do not know anyone that has done this. With that I am not sure if they are able to graduate high school with their associates degree. I advise you to talk to a guidance counselor to get more information.