"We can't say he's guilty, we can't say he's innocent, can't confirm or deny anything, we can't prove a negative, we can't even..." We say it best when we say nothing at all.
https://en.m.wikipedia.org/wiki/Tautology_(language)
You’re not getting a tautology out of a DoJ that simultaneously claims:
1) Hillary demonstrably broke the law but is not guilty
2) Trump did not demonstrably break the law but is possibly guilty