TUCSON, Ariz. — Federal prosecutors(公诉人) brought charges Sunday against the gunman accused of(被指控) attempting to assassinate(行刺) U.S. Rep. Gabrielle Giffords and killing six people at a political event in Arizona.
Investigators said they carried out a search warrant(搜索证) at suspect(嫌犯) Jared Loughner's Tucson home and seized an envelope from a safe(保险箱) with messages such as "I planned ahead," "My assassination" and the name "Giffords" next to what appears to be the man's signature. He allegedly(依其申述) purchased the Glock pistol used in the attack in November at Sportsman's Warehouse in Tucson.
Court documents also show that Loughner had contact with Giffords in the past. Other evidence included a letter addressed to him on Giffords' congressional(国会的) stationery(信纸) in which she thanked him for attending a "Congress on your Corner" event at a mall in Tucson in 2007. Giffords was shot at her first "Congress on your Corner" event with constituents(选民) of the new year.
Heather Williams, the first assistant federal public defender(公设辩护队) in Arizona, said the 22-year-old suspect doesn't yet have a lawyer, but that her office is working to get a lawyer appointed for him.
Williams' office is asking for an outside attorney because one of those killed was U.S. District Judge John M. Roll.
Pima County Sheriff Clarence Dupnik said Sunday that Loughner acted alone.
Meanwhile, authorities released emergency calls in which a person witnessing the mass shooting outside a grocery store in Tucson describes a frantic(混乱的) scene and says, "I do believe Gabby Giffords was hit."