A federal grand jury in the U.S. state Arizona has indicted accused gunman Jared Lee Loughner on 49 counts in the January rampage that gravely wounded Rep. Gabrielle Giffords and 12 others and left six dead, including a chief federal district judge, U.S. media reported on Friday.

The grand jury, in an unexpected development, handed up a superseding indictment against 22-year-old suspected shooter involved in the Jan. 8 melee outside a supermarket in Tucson, the second largest city in Arizona. Giffords was shot in the head when she was greeting her constituents at a parking lot outside the supermarket. Six people, including Chief U.S. District Court Judge John Roll, were killed and 12 others wounded.

Giffords has been receiving medical treatment of traumatic brain injury since then. She was transferred to The Institute for Rehabilitation and Research (TIRR) Memorial Hermann Rehabilitation Hospital in Houston, Texas on Jan. 21.

The new indictment includes 49 counts stemming from crimes against all of the victims, rather than just those five victims who were federal employees.

The renewed indictment includes the first charges, attempted assassination of a member of Congress and two counts of attempted murder of a federal employee for wounding Giffords' aides, Ron Barber and Pam Simon. The indictment also contains the murder charges for the deaths of Roll and Giffords' staffer Gabe Zimmerman, and charges related to those who were wounded or endangered at the event.

Loughner was indicted on Jan. 19 on three federal charges related to wounding Giffords and two of her staffers. He has been held without bail by the Federal Bureau of Prisons in the Federal Correctional Institution at Phoenix.