"I just got a new toy!" Caffall wrote.
The page also contained several quotations that referenced war, conflict and violence.
One inaccurately attributed to writer George Orwell said, "People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf."
In a statement posted on the school's website, Texas A&M President R. Bowen Loftin said the shooting marked “a sad day in the Bryan-College Station community.”
“My thoughts and prayers, as well I am sure of the entire Aggie community, go out to the families and close friends of those who died so tragically, those who were injured and anyone else personally impacted by this senseless act of violence," Loftin said.
-- By Philip Caulfield/New York Daily News
With Chris George In College Station, Texas, and Corky Siemaszko and Bill Hutchinson in New York