"You can indict a ham sandwich" is a very known say regarding grand juries, prosecutor have the opportunity, unchallenged, to present their evidence, on their term, under their narrative to a grand jury and only need simple majority to ensure an indictment. Ergo "You can indict a ham sandwich".

So its extremely TELLING of how incompetent a prosecutor or how bullshit a case is when they fail to secure one.

This is the current Admnistration in a nutshell