This is from 2007, but I haven’t seen this; though, I studied this extensively back in the ’90s.
From: Deseret News
Nichols says bombing was FBI op
Detailed confession filed in S.L. about Oklahoma City plot
Feb. 21 2007
The only surviving convicted criminal in the April 19, 1995, bombing of the Alfred P. Murrah Federal Building in Oklahoma City is saying his co-conspirator, Timothy McVeigh, told him he was taking orders from a top FBI official in orchestrating the bombing.
A declaration from Terry Lynn Nichols, filed in U.S. District Court in Salt Lake City, has proven to be one of the most detailed confessions by Nichols to date about his involvement in the bombing as well as the involvement of others. …
The most shocking allegation in the 19-page signed declaration is Nichols’ assertion that the whole bombing plot was an FBI operation and that McVeigh let slip during a bout of anger that he was taking instruction from former FBI official Larry Potts.