(Tupelo, MS) According to an affidavit, the deadly poison ricin was found inside a Taekwando studio once owned by current suspect James Everett Dutschke.
Ricin was also found on several items including a dust mask, recovered from a trash can near the studio.
FBI agents also say Dutschke ordered Ricin beans from Ebay in November and December.
Instructions on how to make ricin were found on a computer belonging to Dutschke.
Dutschke, 41, was arrested Saturday by FBI agents at his home in Tupelo, Miss., and is being held without bond pending a preliminary and detention hearing Thursday in U.S. District Court in Oxford.
Dutschke is charged with making and producing ricin as part of investigation into poison-laced letters sent to Obama, U.S. Sen. Roger Wicker and a Mississippi judge.
The FBI searched his home, vehicles and former studio last week, after dropping charges against Elvis impersonator, Kevin Curtis, who said he had feuded with Dutschke in the past.