Shooting at Northern Illinois University

Emergency personnel prepare to transport student Harold Ng out of Neptune Hall, a residence hall at Northern Illinois University, Feb. 14, 2008, in DeKalb. Ng was later released from the hospital.

(Patrick Yeagle / Chicago Tribune)

Chicago Tribune

Sept. 16, 2014 7:36 AM PT

Police stand outside Cole Hall on the NIU campus where a gunman opened fire in a lecture hall killing five students dead before himself.

(Alex Garcia / Chicago Tribune)

A Northern Illinois University student with his belongings leaves campus hours after the deadly shooting on campus earlier that afternoon. (AFP/Getty photo by Amanda Rivkin)

A law enforcement officer stands guard outside a Northern Illinois University building where a gunman opened fire in a lecture hall in DeKalb, Feb. 14, 2008.

(Charles Rex Arbogast / AP)