A Texas man, who made his initial appearance in federal court Wednesday, had bragged earlier of trying to sell 100 pounds of cyanide briquettes and said he had enough of the deadly chemical to kill a city…

The deal to sell the cyanide to an unknown buyer in Oklahoma City ultimately "fell through," according to the affidavit, but the FBI worked with an informant to set up a sting operation to continue the investigation. The investigation culminated Monday when Jeffrey Don Detrixhe of Higgins, Texas, was arrested in southeast Oklahoma … Earlier in the day, federal agents had raided his house in Texas and taken possession of a container of material suspected to be sodium cyanide. […]

Federal authorities first learned of Detrixhe's possible possession of cyanide in November from an inmate at the Potter County jail in Texas, who apparently was a friend of Detrixhe, according to an affidavit signed by FBI agent John Whitworth.

In late March, FBI agents asked the informant to tell Detrixhe that someone in the Aryan Brotherhood, a white supremacist organization, wanted to purchase the cyanide to use it against people. […]