Except in cases of impeachment, or in cases arising in the land or naval forces, or in the militia when in actual service in time of war or public danger, no person shall be held to answer for any offense which is punishable by death or by imprisonment for life unless on presentment or indictment by a grand jury, and no person shall be held to answer for any other felony unless on presentment or indictment by a grand jury or on information in writing signed by the attorney-general or one of the attorney-general's designated assistants, as the general assembly may provide and in accordance with procedures enacted by the general assembly. The general assembly may authorize the impaneling of grand juries with authority to indict for offenses committed any place within the state and it may provide that more than one grand jury may sit simultaneously within a county. No person shall be subject for the same offense to be twice put in jeopardy. Nothing contained in this article shall be construed as in any wise impairing the inherent common law powers of the grand jury.