The smell seems to be the strongest around the vent room closest to the door (19). Norihito and Zenzo enter expecting the worst... and that is exactly what they get.
Yuri Himura's battered, bloody corpse is propped up on its knees directly in the middle of the room. Her hands are tied behind her back, and the top half of her leotard is missing, revealing the damage on her back for all the world to see...