In the parking lot, the character is given the choice to use pepper spray. In the UK, security guards are not legally allowed to use pepper spray.
There is one branch that gets a main character killed, but if you continue this route only to take a wrong turn later you get back to the original branch (where supposedly this dead character is still alive), the main protagonist continues the movie as if this person is alive even when they died 20-30 minutes ago. He is literally putting his own life in danger to save the other character (even when she is dead).
No matter which path you take, if and when you get to a part where your character leaves Sébastien LeClercq's room, he says "And you never heard about the hidden compartment." However, this was announced publicly at the auction which he knows you heard since he was there also (just not whether or not anything was in it).