...He knew and should have gone public more than six months ago....
That is not how prosecutions work. You never declare what you know or what info you have, until you have interviewed everyone.
You build your case step by step, looking for inconsistencies in testimony.
A good prosecutor never rushes to the TV cameras to spout out amazing headlines, which tips off his prosecutorial road map.
He’s not a prosecutor. He doesn’t have power to prosecute. He should have gone public and demanded a special prosecutor six months ago.