Nicole enters the tenement house on the left (the entrance is near the cars parked on the street). She goes all the way up to the top floor to meet the policeman standing in the hall. She notices a toolbox beside him, then enters the apartment in which the murder took place - the constable is waiting inside. The discussion is a bit warmer then the previous one (she gets Michel Pety's business card), but the constable doesn't allow Nicole to look around the apartment, and insists that she stays clear from the desk near the window. Bonnet's only work is taking the photos of the hooked ropes hanging from the ceiling and the aforementioned desk. She notices that the window is open.
Back at the staircase agent asks the policeman about the murder and learns that the woman leaving one floor below probably saw the murderer. Nicole runs down the stairs and rings the doorbell, hoping to ask the woman some questions, but she doesn't want to cooperate - she already gave the testimony. Nicole rings the door once more using Pety's card (just use the card on the doorbell) and learns that miss Grouchet heard the sound of metal dropping on the sidewalk.
Nicole goes outside and takes a look at the sewer grate (bottom part of the screen; zoom in). She notices a gold bracelet but she has no means of pulling it out. She heads back to the staircase in front of Dupree's apartment and asks the policeman to let her use the toolbox. The policeman refuses. Nicole needs a distraction, so she goes a level down and picks up a newspaper from the mailbox on the left side of miss' Grouchet door.
She goes back up and makes a suggestion to the policeman, that there's something interesting inside. When he moves closer to the lamp Nicole has a chance to get to the toolbox (close-up) and grab: evidence bags, finger print foil and a screwdriver.
She closes the toolbox and goes back to the street where she uses the screwdriver to lift the grate and picks up the gold bracelet with the name "Lukas" engraved on it, using the evidence bag. She then receives a call from Pierre that she got a letter from some American guy.