Updated from Sunday, Jan. 9TUCSON, Ariz. ( TheStreet) -- Jared Loughner faces a federal court hearing Monday on charges he tried to assassinate Rep. Gabrielle Giffords (D., Ariz.) and killed others in a Tucson shooting rampage, according to reports. He already has been charged with two counts of murder, two counts of attempted murder and a count of attempting to kill a member of Congress, the Wall Street Journal reports. Authorities allege the 22-year-old Arizona man scrawled on an envelope the words "my assassination" and "Giffords" sometime before he took a cab to a shopping center where the congresswoman was meeting with constituents Saturday morning, the Associated Press reports. The shooting Saturday killed a federal judge, a congressional aide, a young girl and three others. Giffords, shot in the head at close range, and 13 others were injured. Giffords is in intensive care at a Tucson hospital. She was responding on Sunday to simple commands by squeezing a hand or showing two fingers, AP reports. Giffords won re-election to a third congressional term in November, the AP noted. She had come under fire from some conservative politicians, including Sarah Palin, for her support of the health care bill, and her office was vandalized the day the legislation passed the House, the AP added. Giffords has said that she is a former Republican and considers herself a Blue Dog Democrat, the AP said.