http://thetural.com/

View my full guide here:
http://www.xbox360achievements.org/forum/showthread.php?t=187066

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Level: The Gulag
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1. As your team moves towards the arch with the red light, go to the stone stairs before it, inside the room on the far wall is the Intel sitting on some filing cabinets.

2. On a desk behind the large wall of monitors you encounter on your way through.

3. After you obtain the riot shield and leave the room where you got it, turn left and proceed down the hallway. In the first open cell on the right-side wall is the Intel on a desk.

4. When you find the person you're looking for, turn to your left and the Intel is on the desk.