Murder and Killing A huge Difference between them.

[Don John of Austria]

It's quite simple

Murder the killing of a Human Being, who has not Forfieted their life, with the intention of killing them. This would apply even if it were just to infact kill them; if that is the intention ( rather than some morally correct intention, ie. to save the innocent, to bring justice, etc) it is then Murder. Someone can forfiet there right to live by unjustly threatening the life of another.

Killing -- well its just killing, there is nothing wrong or right about it, Killing can be Just, it can even be morally obligatory, it can also of course be murder, it depends on the case and the intent of the killer.

[White Knight]

That is correct.