I hit half-kill and did not die

Today, I was in the coliseum taking out pvp, I got half-kill on the PC known as "PureEva" and it did not die, how can this be? in all my life lineage II, I have never seen anything like it, because if you hit the skill and the person does not die, the game is not at the discretion of the skill or dagger. I want an explanation that has a nexus. And I have print to prove it.

The term "Half-Kill" does not necessarily mean that every blow is "Instant-Kill" as it is also described in the Greater Topaz, although the rate is much lower.

Halfkill does nothing but drain the CP of opponent.

Halfkill does nothing but drain the CP of opponent.
When no CP, HP will be lowered by half too.

since the beginning of that l2 lethal left his opponent with only 1 life, hence the name half dead, if that is no longer valid, for me the game does not live up to dagger's skill

Half kill only Drains CP, it doesn't do anything else, and no it does not drain 50% HP.

lol, your life in L2 must have been very short one.Half-Kill doesn't do much besides CP drain or half-hp drain (eventually if no CP left , which is rare).Also a killing blow can be evaded by LUC proc, but that's another story.