Ok, here it goes. When your in the Night of the Jackal stage, and your looking for the doctor, you will find her at an elevator. Go into the elevator. When the elevator stops, get out a gun (if you didn't have one out) quickly. There is a guard on the level above you. Take him out, then in front of you, you will see a gas barrel, shoot it, you should see body armor and some ammo.
Submitted by Keater Peter Pumkin Eater