I have tried quite a few more combinations, but can't seem to get it to work at all.  Even if I put it in EVENT_ATTACK and have another corpse of the same NPC nearby, it won't delete the nearby corpse.  The script below has many commented out sections of some of the quest objects I have tried with no luck so far.
Test Script:
	Code:
	#depop corpses
sub EVENT_ATTACK {
#$EntityList->DeleteNPCCorpses(2700660);
#$c = $EntityList->GetCorpseByID(2700660);
#  if ($c) {
#    $c->RemoveAllCorpses(); }
#$EntityList->RemoveCorpse(2700660);
my $deadnpc = $EntityList->GetCorpseByID(2700660);
  if ($deadnpc) {
    my $delete_corpse = $deadnpc->CastToCorpse();
    $delete_corpse->SetDecayTimer(1);
    quest::say ("$deadnpc"); }
}
sub EVENT_DEATH {
#my $c;
#quest::depop();
#$Corpse->Delete(2700660);
#$EntityList->GetCorpseByID(2700660);
#$EntityList->DeleteNPCCorpses(2700660);
#$c = $EntityList->GetCorpseByID(2700660);
#  if ($c) {
#    $c->SetDecayTimer(1); }
}
 Also, I wanted to note that the suggestion example from spoon shows:
	Code:
	  $c = $entity_list->GetCorpseByID(2700660);
 But, I think it is supposed to be:
	Code:
	  $c = $EntityList->GetCorpseByID(2700660);