Short version is the FBI KNEW the Murrah Building was going.to be bombed and they blew the sting that might have stopped it.
The ATF/FBI got greedy, wanted not just to convict but instead wanted to dramatically catch them ALL right int the act, yet the final timing timetable got changed at the last minute and the blast went off fine.
So the US government had to kill the citizens who knew, because it was An Enormous Scandal.
John Doe II Times —wow..!
A little known but amazing resource.
A fascinating rabbit hole.