Ricin suspect freed, marshals say

(CNN) - The Mississippi man accused of sending ricin-tainted letters to President Barack Obama and other officials has been released from federal custody, a spokesman for the U.S. Marshal's Service said Tuesday.

Paul Kevin Curtis, an Elvis impersonator from Corinth, Mississippi, was charged with sending a threat to the president last week after letters containing the poison triggered security scares around Washington. But a preliminary hearing that had been scheduled to continue on Tuesday was canceled and Curtis was released.