TODAY | April 24, 2013
>>> we're going to begin this morning with that strange twist tied to those ricin-laced letters in washington. andrea mitchell has the overnight developments on this. good morning, andrea.
>> good morning, matt. this morning, a lot of questions about that ricin investigation. it appears that the fbi had the wrong man and is still looking for whoever sent those toxic letters to president obama and mississippi senator roger wicker .
>> i would like to thank all my family, friends, and fans for their love and support over this past week.
>> reporter: in mississippi , a federal magistrate released carl kevin curtis after prosecutors dropped all charges against him in connection with those letters containing ricin that went to president obama and mississippi senator roger wicker last week.
>> i respect president obama . i love my country and would never do anything to pose a threat to him or any other u.s. official.
>> curtis , an occasional elvis impersonator , had been in jail since last wednesday.
>> this past week has been a nightmare for myself and my family. my mother has suffered as well as my children. i would like to get back to normal.
>> reporter: investigators say the fbi found to evidence of ricin in a search of curtis ' home. and as curtis was being let go, the fbi was searching a second mississippi location. the tupelo home of a man named j. edward duchky, an acquaintance and sometimes adversary of curtis . duchky also says he is innocent.
>> i had nothing to do with those letters.
>> reporter: meanwhile in washington, alarms went off tuesday at a mail facility in bowling airport, indicating the possible presence of dangerous toxins. further tests found no specific package, but they are taking more samples. bottom line, an innocent man has now been cleared and whoever is sending these letters may still be out there. matt?
>> i'll take it, andrea. thank