In "Ritual Cleansing", get over the semi blocking the door to the archive storage building. Collect the crowbar by climbing boxes next to the storage room which the crowbar is in. There will also be piles of boxes on the roof of it. Once you grab the crowbar, open the gate and move toward the farthest files. There will be a light tan gate with a padlock on the other side. Turn right and open the huge gate. Inside this garage you will see a green car with an American flag tarp over it. This is the car from the scene in Silence Of The Lambs where Clarice (Jodie Foster) is investigating a rental garage, and finds a head in a pickle jar in the back seat.