The notes in question have turned out to be a list of unverified claims and speculations assembled during the critical first hours after the bombing. Its common for law enforcement officers to document everything they hear or pick up as an investigation gets underway. The follow-up is that no such videotape actually exists. Here is the explanation in today's AP story:

A Secret Service agent testified Monday that the log does, in fact, exist but that the government knows of no videotape. The log that the information was pulled from contained reports that were never verified.

Stacy A. Bauerschmidt, assistant to the special agent in charge of the agency's intelligence division, said the timeline was an internal log developed to help locate personnel lost in the bombing and determine if the agency was a specific target of the attack.

Reports may have been based on mere speculation and the agency does not vouch for it reliability, she said.

"It's for us. It's a crisis document," Bauerschmidt said during testimony at bombing conspirator Terry Nichols' murder trial in McAlester, Okla.

Its unfortunate because conspiracy nuts tend to feed on this stuff and make it into much more than it really is.