Terry Nichols, who along with Timothy McVeigh was convicted for the 1995 bombing of the Oklahoma City federal building, has implicated gun dealer Roger Moore in the plot. According to Nichols, "Moore provided McVeigh with the binary explosives known as KINE-STIK (aka-KINE-PAK) which consist of 2 components -- ground ammonium nitrate and nitromethane -- and is approx. the size of a stick of dynamite."
But Moore, who had previously been investigated by the FBI, had earlier told the Los Angeles Times that a lie detector "test" convinced the Bureau that he was not involved. See, "Oklahoma City Bomber Nichols Says a 3rd Man Took Part in Plot" (http://www.latimes.com/news/nationworld/nation/la-na-okcbomb4may04,1,1995158.story) dated 4 May 2005 by Los Angeles Times staff writer Richard A. Serrano.