Of course there is. But two issues are 1) prove that it was a bribe and 2) prove that it happened. A room full of 100 witnesses will say there was no bribe. And the “documents” will show that the Air Force had considered closing the base for a long time... These guys are pros. There are a few dumbbutts who get caught with cash in the freezer or getting a free home addition built... but for the most part they know how to “work it”.
Read randita’s post #58. These ‘deals’ are what grease the wheels. Always have and always will. It’s their control of resources that corrupts them thoroughly.