In the mission Bad Call in Crime Scene Cleaner, we must hunt down four cameras scattered around the map to unlock the white door in the attic. Inside the white door, you will find the music box disc. While the game gives out clues to the location of the camera, they are pretty vague. Here is the location of all four cameras, and collect the Music Box Disc in Crime Scene Cleaner.
Get to the Attic
First, you must make your way inside to the Dealer’s apartment and take the ladder to the attic. Here you will find a locked white door, and it’s on the left. You will find 4 pictures hanging on a wire. Each picture shows the location where the camera can be found.
#1 Camera Location

You will find the camera in the attic, pointing at the dead body hanging off the wall. Interact with the camera and take pictures of the dead body in the attic.
#2 Camera Location

Now go out of the attic, pass the bathroom, and make it to the room with a lone dinner table in the middle with a dead body on it. Follow the route until you see an open window on the wall at the corner. Slowly crawl through the window, and you will see the camera on the left. Interact with it and take a picture of the apartment building on the left to complete it.
#3 Camera Location
Crawl back through the open window and turn left, take the stairs, and then another left. Follow the route and you will find the third camera in the same room with a static TV on the table. Interact with the camera and take pictures of the static TV in the corner of the room.
#4 Camera Location
You will find the camera behind the pickup truck outside the apartment. Interact with the camera and take a picture of the dumpster behind the fence.
With all cameras found and pictures taken, make your way back to the Attic of the apartment. The white door will now be open. Head inside, and interact with the wooden music box on the table to collect the Disc.