for a senate run. we'll go there as soon as he takes the podium. an actress is accused of sending ricin laced letters to president obama and mayor bloomberg. ed lavandera has more. >> reporter: investigators escorted shannon richardson into a federal court building in texas. fbi officials say richardson has been charged with mailing a threatening communication to the president of the united states. in her hometown of new boston, texas, neighbors know this red head as shannon richardson but in hollywood she's known as shannon guess, an actress appearing in minor roles in television shows like "the walking dead" and "vampire diaries." it appears she tried to frame her husband in this real life drama.