There is nothing on the Keeper cards or in the Scenario saying that dead Investigators or humanoid monsters drop a corpse. There is just the starting corpses on the Keepr card, and maybe somoe more coming along the way, cough cough. If Investigators and humanoid monsters drop corpses like with "Raise Dead", then the tactics change considerably. Do we drop a corpse for human(oid) death, like with Raise Dead?

Another question, spoiler for objective

There is extra health for one baddie, per mutation, as long as the Objective is revealed. Now the Keeper cards allow for putting one mutation per turn on a monster. does that mean one could put one mutation on this monster, while the Objective is revelaed, to give him more health after the Objective is revealed? It gives the Keeper more tactical possibilties, but of course it is harder for the Investigators. What is the intention?