There is no double jeopardy for being brought before a grand jury.
Now is the time for intense pressure to be reapplied to Governor Nixon to replace the prosecutor Mc Callough. There is no law preventing the next grand jury in St. Louis county from going back and hearing the case as long as the statues of limitations don't run out. Which for the charges offered do not expire.
The media will not report this because they are not lawyers they are just talking heads reading scripts and putting on make up. So don't let the naysayers tell you any different this is not over.