A Texas woman has been arrested in connection with the mailing of three letters containing a form of the poison ricin to President Obama, New York City Mayor Mike Bloomberg and the director of Mayors Against Illegal Guns, federal authorities said.

Shannon Rogers Guess Richardson of New Boston, Texas, originally called the Federal Bureau of Investigation claiming that her husband had sent the letters, officials said. The investigators found that she had sent the letters herself, they said.

Richardson is an actress with minor roles on television shows like The Walking Dead and the Vampire Diaries, and was arrested in Arkansas on charges that will be filed Friday afternoon, the authorities said. She has five sons, according to the New York Times.

Her husband, Nathaniel Richardson, is an Army veteran