(Newser) – The ricin letters sent last week to President Obama and Michael Bloomberg have resulted in a unique round of he-said-she-said: As CBS News reports, a Texas woman told cops that her husband may have been behind the letters, but he in turn pointed the finger at her, saying that he had been set up. Authorities, who have been camped out at the couple's home in New Boston since Thursday, say that the wife had specific knowledge of the letters. FBI agents in Hazmat suits were seen searching the residence on Friday, adds the AP, but no charges have been filed. (Read more ricin stories.)