A federal agent who exposed the Justice Department’s flawed gun-trafficking investigation known as Operation Fast and Furious says the FBI played a key role in events leading to the 2010 murder near Nogales, Ariz., of U.S. Border Patrol Agent Brian Terry.

John Dodson, a special agent with the Bureau of Alcohol, Tobacco, Firearms and Explosives, contends that the bandits who killed Terry were working for FBI operatives and were sent to the border to do a drug rip-off using intelligence from the federal Drug Enforcement Administration.

“I don’t think the (FBI) assets were part of the rip-off crew,” Dodson said. “I think they were directing the rip crew.”

Dodson’s comments to The Arizona Republic amplify assertions he made in his recently released book, “The Unarmed Truth,” about his role as a whistle-blower in the Fast and Furious debacle.

Terry belonged to an elite Border Patrol tactical team sent to a remote area known as Peck Canyon, roughly a dozen miles northwest of Nogales, where violence had escalated because criminal gangs were stealing narcotics from drug runners known as mules. He was slain in a shootout with several bandits. Two assault-type rifles found at the scene were subsequently traced to Fast and Furious.