So let me see if I have DOJ procedures correct.....

[intrepidity]

3. A good start (your narrative), but not complete

You left out how, after leaving office, any investigation must be done extreeeemely slooooowly and overly cautiously, to avoid looking even the slightest bit partisan or "political." And that, if done during an election year, even a mid-term (so, pretty much every other year), nothing can be done publically within some months of an election.

Oh, and that if that person has a substantial following that is prone to violence, the whole thing may not even be worth the effort, at all.