On the morning of January 8, 2011, nine-year-old Christina-Taylor Green attended a Congress on Your Corner event hosted by U.S. Representative Gabby Giffords in a Safeway parking lot in Casas Adobes, Arizona. Born on September 11, 2001, she had recently been elected to her school’s student council and was described as having an interest in politics. A gunman opened fire at the event, wounding many and killing six people; Christina-Taylor Green was the youngest victim and was pronounced dead after being taken to the hospital.

The shooter, identified as 22-year-old Jared Lee Loughner from Tucson, was tackled by bystanders and taken into custody. Reports say a second person of interest was initially mentioned but was later cleared. Federal charges were filed against Loughner, and subsequent legal proceedings followed in connection with the attack that devastated the Tucson community and the nation.

Did anyone at the event or in the neighborhood notice anything unusual about the shooter’s arrival or behavior that morning?