Despite the government’s insistence that the case has been solved, many details of the Oklahoma City attack on the Murra Federal building remain unexplained. We don’t know the exact origin of the plot or how many people carried it out.
We don’t know how McVeigh and Nichols learned to build a fertilizer bomb of such size and power. (Neither received more than rudimentary explosives training when they served together in the Army, and their early experiments with smaller devices were haphazard at best.) We don’t know the identities of the other people seen with McVeigh on the morning of the bombing – only that more than 20 eyewitnesses were unanimous in telling the FBI he was not alone.
There is no ready explanation for a different Ryder truck seen by witnesses at McVeigh’s motel in Kansas and at the state park where the bomb was assembled in the week leading up to the bombing; no explanation for the other people seen inside McVeigh’s motel room during the same period; no satisfactory explanation of the fact that two people were seen renting the bomb truck on 17 April, neither of them entirely fitting McVeigh’s description.