Dissection room key?

[Brigador Lemur]

I need to get inside the dissection room in the basement, but I have not been able to find the key.
Can somebody give me a hint as to where I should look for it?

[(N☆G) Jackal ★JJ★]

Publicado originalmente por Kanaev:

Morgue. There's a puzzle on the wall.

God I'm happy you got here before me. I would have ruined the puzzle not thinking. :|

[poncho.]

well you know that theres a pile of psycho pills in the basement wich lets you basically see every item through walls even...: Z

[Brigador Lemur]

Publicado originalmente por Kanaev:

Morgue. There's a puzzle on the wall.

Well, I already solved that puzzle, but I, for some reason, never thought of looking on the slab after it.
Yeesh, I must be really out of it with these games if I missed something that obvious. XP