A citizen-initiated grand jury is an enormously difficult process because the local authorities will bring everything to keep it from happening...can’t have the proles exposing the malfeasance, bad for business.
We are aware. But does this mean that citizens cede the responsibility of investigation over to the media which is only a tool of the same corrupt government ?
Even if it never reaches a grand jury level, citizens can form committees for inquiry into government corruption and wrong-doing, and expose what they find through various channels (their own printing and distribution, Internet web sites, word of mouth, public assembly, radio, etc.)
If citizens are not willing to undertake "enormously difficult" processes, they will be over-run by the wicked. This is war. You either fight, take risks, and sacrifice for truth, or you lose.