When Marcy arrives at David's apartment, her medical bag should still be lying in the middle of the floor, where it was left when Jeff and David departed with the wounded archivist in the previous chapter.
The medical bag was carried out of the apartment by the archivist, who grabbed it while David got his gun.
The medical bag was carried out of the apartment by the archivist, who grabbed it while David got his gun.
David opens the blood blank container from the inside after defusing the bomb. He says he knows how to do it and with one press on the pad the door opens just as the archivist entered.
But the problem is hes also told its a bio-metric lock meaning only the archivist could open it not David.