"If any place could be called a nightmare, this would be it. Having given up any claim to humanity, they see me only as food. Indeed, upon sight, they come swarming, grunting, and snorting like starving curs. If this madness is no dream, I must run. My instincts scream it. But I am also fascinated by Viktor, the lord of this madhouse. My professional curiosity keeps me here."
Detective's Tapes #09


Once you climb down the ladder to the room with explosive red crates and 3 corpses hanging from the ceiling the tape is straight ahead on a shelf against the back wall. You may need to explode one of the crates to get it. (Act 3)

Follow this video walkthrough for more details: