Everett Dutschke works on his mini-van in his driveway in TupeloBy using Emily Lane JACKSON, Mississippi (Reuters) – A mud mask and different gadgets seized from the martial arts studio of a Mississippi man charged with sending poison-laced letters to President Barack Obama and two different public officers examined positive for ricin, according to a court document released on Tuesday. Records seized by the FBI also showed that Tupelo martial arts teacher Everett Dutschke ordered castor bean seeds, used to make ricin, from eBay, FBI Different Agent Stephen Thomason said in an eight-web page affidavit. Dutschke is expected to appear in U.S. …