Youre close, Tax, but to clear up the confusion Id drop the word file. If you call the cops and orally tell them a crime occurred you havent filed anything. Also ditch the synonym for reporting a crime: press charges. You can report the crime, but there will be no court case unless the prosecutor chooses to file a complaint with the court. By the same token, sometimes, especially in cases of domestic violence, the prosecutor will file a court case even if the victim doesnt want them to.
To use common phrases, Id put it this way Anybody can report a crime, but only a prosecutor can press charges by commencing a criminal court case.
Grand juries only deal with the cases that are brought to them. Once they issue an indictment, it is filed with the court by the prosecutor, because only the prosecutor has standing to start a court criminal case. Civil is completely different: anyone who has a claim has standing to file a lawsuit in his own name.
In other words, you can't prosecute the crown unless the crown deigns to allow itself to be prosecuted.
Thanks for the clarification. Learn something new every day here on FR!