Investigators have arrested a Mississippi man in connection with ricin-laced letters sent to government officials earlier in April.
James Everett Dutschke was arrested Saturday at his home in Tupelo, Mississippi. Dutschke's attorneys say federal investigators searched Dutschke's home and his martial arts studio earlier this week.
Dutschke, who was charged with possession and use of a biological agent as a weapon, is expected to appear in court on Monday
The letters created a security scare across Washington, D.C. after they were sent to Sen. Roger Wicker (R-Mississippi) and President Obama. The Department of Justice said a third letter was sent to a Mississippi judge.
The FBI said initial tests on a "suspicious substance" on the letters tested positive for ricin, a deadly poison derived from castor beans. Letters sent to Wicker and Obama were intercepted at off-site mail facilities.
Paul Kevin Curtis was originally arrested April 17 and charged in the case, but those charges were later dropped after authorities said they discovered new information. Curtis said he was framed and identified Dutschke as a potential suspect.
CNN Wires contributed to this report.