The leadership should have called the cops when they first knew of the emails.
Quite frankly, it will be difficult to separate lack of awareness of the problems with Foley from plausible deniability set up by having staffers deal with the issue under the radar. But sooner or later the truth will come out.
Until then, I will withhold judgement. But when the truth does come out, the judgement should be severe, the political consequences be damned.