Secret Indictments?

So I just watched a video which talked about thousands of "secret indictments". The idea of a "secret indictment" is that all of the perpetrators of a "secret indictment" can be arrested at one time. Supposedly, all of the arrests can be conducted at one time simultaneously so that perpetrators can't contact each other and let them know what is going on. They are normally used for Mafia type arrests but, it can be used in other cases.

My questions are, is this true, are there really "thousands" and how long will it be before the indictments result in arrests? The way it was explained to me is that after the perpetrators are arrested, then the indictment will be opened, read in court and no longer "secret". If there are actual indictments, will they be covered by the MSM or covered up and ignored?

I have read the same. I'm wondering too.

You'll jes has to axed Dean Wormer. Granted he usually dealt with dubble secret indictments. But I'm certain he would have all the required info on these.