Restrain the body as securely as possible. Even if he is dead for now, he may be back soon. Perhaps tie him to the vacant post in the Dummy Room?
Whew...we made it. With the tranq he should be out for a while...
Take the saw. Loot Filbert for items.
Then the security room.
Pat filbert down for useful Items, cautiously.
Then lets head on up to the security room.