Heard this answer to a very similar question a decade ago from an attorney:
1) Become the foreman on a Federal Grand Jury
2) Charge those involved as you see fit
You don’t need the DA to do this we were told.
If fact you probably don’t want them involved
President Biden's aides on Thursday quickly dismissed the press after the president asked if he could take a couple of questions at a campaign event in Saginaw, Michigan.