Ok so this is how it generally goes: usually jurisdiction lies in the county where the crime took place – with the only exception maybe one can think of is if someone is killed in one state and the body is dumped in another, then the state that has the body could prosecute the murder as well as the state where the murder took place.  Duel jurisdiction for the murder. So if you are charged with assaulting the victim up in Hawaii and then returned to New York, New York can not prosecute you but they could extradite you.  I would suggest seeking legal counsel in Hawaii given you were charged.