Visible crew/equipment: While Blanc talks to Marta about how long he has known her to be involved in the case and that he has an opinion on whether she should help the family, a person (most likely a crew member) leaves the house in a stooped position, as all the other inhabitants should have left it by now. (02:04:19)
Visible crew/equipment: Marta and the detective are driving to the 1209 location, and he is talking. During this entire scene, the reflection of the camera is visible on the left side of the glass.
Visible crew/equipment: During the car chase, Marta pulls her car into a dead end and the camera moves up to the window. The top of the camera operator's head is visible in the reflection. Later in the same shot, the camera is visible in the glass left of screen.
Answer: She didn't drain either of the vials so unless he actually measured how much of each liquid there was to start with, he was unlikely to notice that the amounts weren't quite what would have expected. He knew enough to know that the switch could lead to a death, but he's not anal enough to note every tiny aspect of the situation to verify that nothing's gone wrong.
Garlonuss ★