Jared Loughner, the man accused of killing six people and wounding then-US congresswoman Gabrielle Giffords in 2011, is set to plead guilty in a Tucson court tomorrow, a person familiar with the case said.

Gabrielle Giffords is to step down from the US Congress this week to concentrate on recovering from wounds suffered in an assassination attempt a little more than a year ago that shocked America.

THE gunman who carried out the Tucson, Arizona, massacre has refused to say anything to police since he was taken into custody.

The gunman who carried out the Tucson massacre in the US has refused to say anything to police since he was taken into custody.