Under Ohio's castle doctrine, you are presumed to act in self-defense if you were to shoot someone inside your home or car. If you shoot them out in the public domain, then the burden of proof is on you to prove the shooting was in self-defense.

If someone breaks into your home or vehicle in Ohio, you have the right to use deadly force if you feel that your life is in danger. But unlike Florida's Stand Your Ground law, cited in the death of Trayvon Martin, that right doesn't extend past your own property.