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Breaking news this morning. freedom for the american mom jailed in mexico. her dramatic release, her emotional reunion with her family, and just moments ago, these words. >> im free! i shout, like, im free, im free! i was innocent, so i was very, very happy to be out. >> we talked to her this morning. person of interest. investigators now questioning a texas man possibly linked to those ricin-laced letters sent to the president and the new york mayor. what led these investigators to him? fir...