OKC bombing tapes appear edited

I’m not a truther. I don’t want to be a truther. I want things to be simple and easily explainable and for things to be exactly as they seem. But if anybody in the government cares, stuff like this is why truthers exist (emphasis mine):

OKLAHOMA CITY – Long-secret security tapes showing the chaos immediately after the 1995 bombing of the Oklahoma City federal building are blank in the minutes before the blast and appear to have been edited, an attorney who obtained the recordings said Sunday.
…
The tapes turned over by the FBI came from security cameras various companies had mounted outside office buildings near the Alfred P. Murrah Federal Building. They are blank at points before 9:02 a.m., when a truck bomb carrying a 4,000 pound fertilizer-and-fuel-oil bomb detonated in front of the building, Trentadue said.

"Four cameras in four different locations going blank at basically the same time on the morning of April 19, 1995. There ain’t no such thing as a coincidence," Trentadue said.

He said government officials claim the security cameras did not record the minutes before the bombing because "they had run out of tape" or "the tape was being replaced."

"The interesting thing is they spring back on after 9:02," he said. "The absence of footage from these crucial time intervals is evidence that there is something there that the FBI doesn’t want anybody to see."

Remember, this is an Associated Press story. This is not some nutbag truther website.

Multiple cameras operated by “various” companies all needing their tape replaced at the same time, and then coming back online after the explosion. Mmkay.

The fact that the evidence for tampering is so clear and the excuse so stupid, I can’t help but think that someone on the “inside” is trying to send a message. They’re basically screaming that there’s more here that someone doesn’t want us to know about.

Trentadue said he is seeking more tapes along with a variety of bombing-related documents from the FBI and the CIA. An FOIA request by Trentadue for 26 CIA documents was rejected in June. A letter from the National Geospatial-Intelligence Agency, which reviewed the documents, said their release "could cause grave damage to our national security."

OK, so the government’s narrative is that a couple of right-wing militia dudes acted alone to build this truck bomb, and blew it up all on their own. One of these guys has been executed, the other is in prison for the rest of his life. The end.

But if that’s the whole truth, then:

1. Why would the FBI release edited tape?

2. Why would there be “grave” national security implications involved in releasing more documents about it?

3. Why is the CIA involved in what amounts to an internal law enforcement issue, and why are they keeping secrets about it?

I very much want to believe that McVeigh and Nichols acted alone. Life would be a lot less complicated if that was true.