The current killed eventhandler only provides unit, killer, and instigator, but not the projectile or hit selection. Those are only available in other eventhandlers, but it would be so much easier if we could detect which projectile killed the unit or which body part was hit that lead to the Kill.
example:
this addEventHandler ["Killed", {
params ["_unit", "_killer", "_instigator", "_useEffects", "_projectile", "_selection"];
}];