Published: Apr 18, 2013 4:53 PM EDT

OXFORD, Miss. (AP) - A Mississippi hospital says the man charged with mailing letters with suspected ricin was fired from the facility more than a decade ago.
    
North Mississippi Medical Center in Tupelo issued a statement Thursday saying Paul Kevin Curtis began working there in 1998 and was terminated in 2000. It did not give a reason for his firing but says it was not because of allegations he made against the hospital.
    
Curtis has written in online postings that he uncovered a conspiracy to sell human body parts on the black market while working there.
    
However, the hospital says it works with an agency that specializes in harvesting organs and tissue from donors, and then immediately transports those organs for donation. The hospital says it does not receive payment for the donated organs.

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