If the sheriff can prove 0 was not born in Hawaii, or at least that the birth certificate is fake, then the citizenship of his father does not matter.
As long as he was born in the US he is a citizen through his mother's citizenship. He has that by right and I wouldn't deny that to him or anyone else as long as they qualify. Children of illegal aliens don't qualify in my book. His father was here legally on a student visa which was covered under USC 8 and he never intended to become a naturalized citizen.
If the birth certificate is fake then he is in trouble for fraud. That's going to be very hard to prove without access to the actual original documents and Hawaii doesn't look like it's going to help anybody in clearing that up.
The citizenship of his father is the chink in the armor and it all revolves around that as it shows that he isn't a natural born citizen. He can't be anything but a citizen through the naturalization process because of his "alien" (a legal definition) father and is therefore ineligible. That's why all of the new cases are being argued on that point alone!