Jared Loughner has been charged by Federal prosecutors with trying to assassinate 40-year-old Governor Gabrielle Giffords and killing two other US government officials, according to an article published by BBC News
Loughner could face the death penalty if proven guilty of the charges in a court of law.
Ms Giffords was holding a public meeting in Tucson, Arizona when she was shot in the head at close range. Six people were killed including a nine year old girl and a federal judge, and 14 others were injured.
US President Barack Obama has called on Americans to observe a minute of silence on Monday at 1600 GMT in memory of the victims.