I don’t understand why this remains sealed until Monday. Why not send a couple marshals and arrest the perp. Does the individual indicted already know?
This is about getting the networks to stage the “money shot.”
Likely the individual/s know they are going to be indicted. Their lawyers are probably negotiating with Mueller or the DOJ right now.
Manafort and Flynn (lying to the FBI) are the obvious targets, but it may turn out to be much smaller fish.
See Post #36.