It was proven to me by views of court dockets listing sealed indictments, no further information given.
Indictments including sealed indictments are docketed. Viewable indictments give a lot of detail about the charges and some information about the person charged.
Sealed indictments show a line on the docket but no viewable information.
Reviews of past dockets have never before shown such an ‘avalanche’ of sealed indictments posted.