Rep. Gabrielle Giffords is now aware of who was killed during the January shooting rampage in Tucson that left her seriously wounded, her spokesman said. C.J. Karamargin confirmed Friday that the Democratic politician was told in late July the names of the dead, including her aide Gabe Zimmerman; U.S. District Judge John Roll, a close friend; and 9-year-old Christina-Taylor Green, the Arizona Republic reported.