I need help with a leader board?

i really need help with this leader board. i am trying to find a way to give a player xp when they kill some one. i have looked on the wiki, and i have tried finding one but there wasn't any.

I am mainly trying to get a way to find who killed who and give the killer xp.

So based on what you're trying to do, you should use your weapons script to award he XP upon a kill.

I cant really give a code example because it would be unique to your weapon.

ok. so the code has to be in a weapon