CNN EarlyStart September 26, 2013 09:06:00
Photos of his gun and the etchings carved into the gun. while the investigation into the mental illness that sewed the seats for the attack continues, agents said they found writings by alexis that explained in plain language why he said he did it. >> a document retrieved from the electronic mead impra stated, quote, ultimate low frequency attack is what i've been subject to for the last three months and, to be perfectly honest, that is what has driven me to this. >> reporter: investigators don't believe he targeted specific people in his 60-minute killing spree. joe johns, cnn, washington. ...