Zimmerman case going to a grand jury.......

[X_Digger]

20. FL Grand Juries can initiate their own investigation

From the link above:

[div class='excerpt'] The grand jury in addition to the duty of formally indicting those charged with crime has the further important duty of making investigations on its own initiative, which it will report as a "presentment." This duty permits investigation of how public officials are conducting their offices and discharging their public trusts. The grand jury may investigate as to whether public institutions are being properly administered and conducted. It has the power to inspect those institutions and, if necessary, may call before the grand jury those in charge of the operations of public institutions as well as any other person who has information and can testify concerning them.

Basically, the GJ gets to rake everyone over the coals.