I’ll feel safer when the conspiring Federal Representatives and Senators are arrested.
They are following standard organized crime investigation tactics. Slap the easiest-to-prove charge on people first (you were there because you are in a photo or video). Use that to get warrants to search their homes, credit card records, phones, social media, etc. Find out who they conspired with, and build higher level charges. Start offering plea deals to the small fish so they turn on bigger fish. Work up the ladder.
Unlike standard organized crime families, in this case the top people were very visible, so you can also start at the top and work your way down. The sheer number of people involved is probably why this will take a while.