The OKC bombers were video taped by at least a half-dozen cameras as the drove the truck up to and parked in front of the Murrah fed building. The tapes covered their egress, and the explosion.
The FBI took possession of all the images, and they have never seen the light of day since. Not even for the ridiculously fast trial and execution.
The tapes have been rumored to have been in multiple places. (Has anyone checked Hiliary’s closet?)
BTW - one of the places the tapes were rumored to be was a navy base in the DC area. I almost wrote this in my post yesterday.