(This is accessible only near the end of the game. )
Found in the first floor, in the small office. You’ll come across this on your way to Find Giorgi.
On the floor, in Giorgi’s office.
Note: This is the only collectible in the game that is missable. Don't forget to pick this up before killing Giorgi since the cutscene will take you up to Sal Marcano. When you visit this place again post-game, the door leading to Giorgi's office will be blocked.