The fact that he won't talk indicates Hinrichs DID try and WAS turned back. If he hadn't tried to get in, he would just say so and that would be in keeping with the bogus lone suicide story.
But the fact he was ordered to say nothing proves the coverup.
If the guard even brags about doing his job correctly (which he did), it would confirm the muslim-suicide-Bomber story. The guard has to be pissed, he doesn't even get credit for doing the right thing (by virtue of the fact that he successfully prevented a mass murder).
I am a season ticket holder for OU and was at the game. I can say that anything being brought into the game is checked at the gate ( I always bring binoculars, my wife her purse). i think he'd have a hard time getting in if the bomb was in a back pack. he may have realized this and decided to try plan B.
I can also tell you, I've been to mosque (long story) and it left me cold. One scrawny runt told me "We look on Jesus as a prophet and a very good man, but the gospels that say he was divine were written by Jews so we know they are lied." He said this as casusally as "The weather in Oklahoma is apt to change without a moments notice."
I think we need to give the guy at the fertilizer store a whole lotta credit for being alert and refusing to sell to Hinrichs. Could have been MUCH worse...