Starting the Investigation
During the quest “Passport to Life”, you'll find this on the table.
Meeting the Informant
Chaos in the Streets
Hiding in the Slums
During the quest Third Head of Cerberus, you'll find this on the corpse beside the third speaker.
Message for the Family
Inside the electronics shop, on the shelf. The electronics shop is marked in your map during the quest Radio Gaga.
A City in Ruins
Found as soon as you reach the police station during the quest “Lady in Trouble”. While in the underground parking lot, look for a dead cop near the door. The recording should be lying beside him.
Heading to the Jungle
After reaching the River Village, its on Mutatero's table.
Something Big is Coming
After reaching the lab, its on the desk before Dr. West's lab.
As soon as you reach the prison, look for it on the bench.
Documenting The Symptoms
After going up the second staircase with some supplies and workbench, enter the first ward to the left and find the recording on the bed. ID#093 should be in the desk nearby.
It's Covered In Blood
After getting Recording #11, exit the ward and you should find a sitting corpse in the middle of the fork. The last recording can be found beside him.
Note: In my gamesave, I can't pick up the damn thing so I thought it was probably glitched. After quitting the game and reloading it and even restarting the console, I am still unable to pick it up so be warned.