Shooting or using any deadly weapon in self-defense is often referred to as Problem One, with the legal aftermath being Problem Two.
Failure to prepare for Problem Two could cost you a fortune and ruin your life, in some states and cities more than others.
While here in Kentucky we're lucky that the legal climate favors lawful self-defense and legal gun owners, you should always know what the best course of action is when you've had to use lethal force.
A recent book by attorney Alan Korwin discusses the topic, and has prompted this reply from an attorney up East.
It's an excellent discussion with good advice and you can read it HERE.