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 ... was filed as part of Salt Lake City attorney Jesse Trentadue's pending wrongful death suit against the government for the death of his brother in a federal corrections facility in Oklahoma City. Trentadue claims his brother was killed during an interrogation by FBI agents when agents mistook his brother for a suspect in the Oklahoma City bombing investigation. 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. Potts was no stranger to anti-government confrontations, having been the lead FBI agent at Ruby Ridge in 1992, which led to the shooting death of Vicki Weaver, the wife of separatist Randy Weaver. Potts also was reportedly involved in the 51-day siege of the Branch Davidian compound in Waco, Texas in 1993, which resulted in a fire that killed 81 Branch Davidian followers. Potts retired from the FBI under intense pressure and criticism for the cover-up of an order to allow agents to shoot anyone seen leaving the Weaver cabin at Ruby Ridge.