Resentment of the U.S. government and suspicions over the 9/11 attacks have surfaced in writings by the Californian identified as the man fatally wounded in a hail of return fire.
Patterico's Pontifications links to evidence of his rants online as well as his Amazon profile and an transcript of his audio manifesto.
The suspect was identified as John Patrick Bedell, sources told ABC News and The Associated Press, which added that he was 36 years old. Keevill would only say the suspect was "an American citizen, as far as I know."
"The officers were emphatic about saying he was very calm, that there was no distress," Keevill said. "He had his arms down at his pocket. We see folks come up to the Pentagon every day that have their passes in different places. He reached into his pocket. They assumed he was going to get his pass out. He came out with a gun and just started shooting."
More from AP and Wapo.