Under what grounds can I shoot a police officer in self-defense?

Under what grounds can I shoot a police officer in self-defense? Legally speaking, you can shoot a police officer in self-defense but self-defense laws are complicated and include provisions for how much force can be used. In addition, self-defense laws vary from state to state and the federal law may apply, depending on the jurisdiction.

In general, self-defense laws cover areas such as was the threat imminent, was the fear of harm reasonable, proportional response, duty to retreat, stand your ground, and the castle doctrine. Even if you were to shoot a police officer in self-defense, you can be assured you will be arrested, jailed (probably without bail) and be expected to pay huge attorney fees.