Ricin letter suspect Paul Kevin Curtis released
Ricin letter suspect Paul Kevin Curtis was released on bond on Tuesday, the day after he appeared in court.
Ricin found in studio of US man charged Updated: 14:20, Wednesday May 1, 2013 Traces of ricin have been found in the martial arts studio of a US man charged in a plot to send poisoned letters to US President Barack Obama and other public officials, the FBI says.