A Texas couple are blaming each other for the new batch of ricin-laced letters sent to President Obama and New York Mayor Mike Bloomberg, and one of them just happens to have played a zombie on The Walking Dead.

The New York Post reports that Nathaniel Richardson was brought in for questioning in the case, but was later set free when he claimed it was his pregnant wife, actress Shannon Guess, who had actually sent the poison letters. The FBI was tipped off to Richardson after Guess called them saying she found ricin in her refrigerator, along with directions on “how to make ricin” and Google searches on Obama and Bloomberg.

Guess, seen on a website for The Walking Dead (via Gawker) and in a separate promotional shot in a bikini holding a rifle (via Uproxx), has also appeared in bit parts on television series like Vampire Diaries, Drop Dead Diva and others.

The motive behind the poison letters appeared to be opposition to President Obama and Mayor Bloomberg’s gun control efforts. The letter to Bloomberg read, in part, “You will have to kill me and my family before you get my guns. What’s in this letter is nothing compared to what I have planned for you.” The FBI is currently investigating both Richardson and Guess as suspects in the case and plan to give them polygraph tests.

Watch a report on the case from this morning’s Today Show below, via NBC:

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