Is that any clearer for you? Clearly, you didn't understand the analogy if you still missed that.
Just because you can't stick it to someone in particular doesn't mean it didn't happen. It is the goal of most criminals and law-breakers to get away with what they have done. Even if I was convinced that she was guilty it wouldn't surprise me that they don't have anything and it would not convince me of innocence. The law must presume innocence on an individual basis, but the public can't just take that to mean that no one anywhere did anything wrong.
How many times has it been witnessed by all how "the fog of obfuscation and confusion" is used so deftly by those veteran gov't bureaucrats in concert with their well honed skills of covering their asses and covering their tracks so as to shield them from scrutiny and possible down-sizing.
With all of that going on, we also have those mini fiefdoms being created up and down the chain of command, each lorded over by some self-appointed baron/baroness that ferociously protect their turf by building walls instead of bridges. The worst being those domains ruled over by clueless patronage pirates and nepotist numbnuts.
So for sure, we can never assume that no one anywhere did anything wrong, when in fact, things are, by the hour if not the minute, going wrong all over, under, around and through the huge bureaucracy that is our federal gov't.
The higher the position, the bigger the screw up, the more elegant and complex the cover-ups are.