So, let's see if it's possible to construct a plausible hypothetical scenario that encompasses all these statements, shall we?
Let's suppose the following happened: Bedell got to the place where he wanted to carry out his attack, wasn't entirely sure which way the Pentagon entrance was, and asked a passer-by. Then he went to the nearest place he could find security guards, opened fire on them, and got shot. The police mentioned that he'd been seen talking to someone just before the attack. That someone got in touch with the police and said, "I didn't know who he was, he just asked me the way to the Pentagon entrance." The police checked out his story, he was ID'ed by some other passers'by, and CCTV footage showed Bedell approaching him, talking to him briefly, and him then leaving the scene before the attack. Result: Police are happy that there was no second shooter, and they choose not to name an innocent witness because there's no need to expose him to the groundless suspicion of lunatic conspiracy theorists like the one who just tried to murder two innocent people.
Is that so implausible that a government false flag conspiracy has to be invoked to provide a better explanation?
Dave