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TODAY   |  June 03, 2013

Woman claims her husband mailed ricin letters

Authorities are still investigating the three ricin-laced letters sent to Michael Bloomberg, President Obama, and a lobbyist, but Texas-based actress Shannon Rogers Guess has said her Army veteran husband Nathanial Richardson is behind the letters. NBC’s Stephanie Gosk reports.

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>>> now to the very latest on the investigation into who sent those ricin-laced letters to the president and new york city mayor michael bloomberg . the focus is on a texas couple each putting the blame on the other. nbc's stephanie gosk has the latest. good morning.

>> good morning, natalie. authorities are still investigating the three ricin laced letters. there have been no arrests made but that texas woman who accused her husband of being behind the plot has been getting a lot of attention. shannon rogers a bit part actress in "the walking dead " and "vampire diaries" accused her husband in a call to police late last week. sources tell pete williams she found husband in her refrigerator. richardson was taken in for questioning and later released while the fbi searched the family home in new boston, texas . neighbors say the couple kept to themselves.

>> he looked to be a nice guy and all of a sudden i saw a state trooper and police and the fbi.

>> reporter: authorities tell nbc news that during questioning, richardson turned around and accused his wife of sending the letters. all three letters were postmarked may 20th in shreveport, louisiana, about 95 miles away . the two addressed to president obama and mayor bloomberg were discovered through mail room screenings.

>> i trust the police department and i feel perfectly safe and you know, i've got more danger from lightning than from anything else.

>> reporter: the third letter was sent to mark glaze, the director of bloomberg's anti-gun organization, who opened it but has not gotten sick. last month a man in mississippi was wrongfully accused of sending a different set of ricin letters to the president , and a judge with this latest set of letters, authorities emphasize that so far, they have no suspects. natalie?

>> stephanie gosk, thanks so much.