Response:  In every jurisdiction that uses grand juries, people can bring information to a grand jury's attention, but you have to be careful how you do it.  In the federal system, for example, it's a crime to communicate in writing with a grand jury with the intent to influence them.  Well, if you're sending a grand jury information about a crime, in a letter, you're obviously trying to influence them, which means you have technically violated the statute.  But you're not likely to be charged with this or any other crime if you are careful how you proceed.  The best way to get information to a state or federal grand jury is to call the federal or county courthouse where they sit and find out which judge supervises the grand jury.  Then call the judge's clerk and ask how you get a letter (or other source of information) to the grand jury.  The clerk may tell you to bring it to the court and they'll give it to the grand jury.  In some states, you can write directly to the grand jury foreperson (in some states, they publish the foreperson's name in the local newspaper).  If you go through the court, it's very, unlikely anyone will think you're trying to influence the grand jury in an improper way.