The governor-appointed prosecutor in the Trayvon Martin shooting case, Angela Corey, brought charges of 2nd degree murder against George Zimmerman without a grand jury indictment. Harvard law professor Alan Dershowitz has questioned the foundations for those charges and that action.
The following link is to an article that explores this question.
This, once again, raises the issue of “prosecutorial immunity”. So much power vested in a single individual with no accountability.