PHOENIX (CBS/AP) Jared Loughner, the 22-year-old who allegedly killed six people and shot Rep. Gabrielle Giffords in the head in a shooting rampage in Tucson, Arizona Saturday, is not cooperating with police, say authorities.
Sheriff Clarence Dupnik told ABC News that Loughner, 22, said "not a word" to investigators regarding the horrific rampage that occurred outside a Tucson supermarket, leaving Giffords in critical condition and 13 others injured.
Loughner, whom neighbors described as a social outcast with wild beliefs steeped in mistrust, is charged with one count of attempted assassination of a member of Congress, two counts of killing an employee of the federal government and two counts of attempting to kill a federal employee. More charges are expected.
Dupnik said authorities were all but certain Loughner acted alone, saying "he's a typical troubled individual who's a loner."
Those killed included U.S. District Judge John Roll, 63, and 9-year-old Christina Taylor Green, who was born on Sept. 11, 2001, and was featured in a book called "Faces of Hope" that chronicled one baby from each state born on the day terrorists killed nearly 3,000 people in the U.S.
Others killed were Giffords aide Gabe Zimmerman, 30; Dorothy Morris, 76; Dorwin Stoddard, 76; and Phyllis Schneck, 79.
Giffords, 40, remains in intensive care at a Tucson hospital.