When is murder justified by self-defense?

[Peh]

aLkaLiNE said:
When it's an accident. I find it hard to validate taking someone else's life no matter what the circumstance. If, in self defense you accidentally kill them then that's one thing. If you intentionally kill them though... Nobody deserves that right of judgement.

I completly agree with you. Everything else what has the intention to kill someone else in order to solve a situation is murder.