Six of the victims were from outside of the United States and were part of a Rotary Club exchange program, while the remaining three were American. Ayala remains in critical condition as of late Sunday evening. A motive for the shooting has yet to be established, with no apparent link existing between Ayala and the victims. A neighbor claimed that he didn't own a gun.
The Oregonian article describes Ayala as "a quiet man with an interest in computers and video games, not guns or nightclubs," noting that he played both Resistance: Fall of Man and Left 4 Dead. No link has been cited between the games and the shooting.