Shannon Richardson , 35 , initially told FBI her husband sent ricin-tainted letters . But she failed polygraph , and husband said she wanted to end marriage , FBI says . Score: 6 Her husband files for divorce ; she 's also pregnant , divorce lawsuit says .
Shannon Richardson , 35 , initially told FBI her husband sent ricin-tainted letters . But she failed polygraph , and husband said she wanted to end marriage , FBI says . Before her arrest , she allegedly admits to mailing letters , but says husband forced her . Her husband files for divorce ; she 's also pregnant , divorce lawsuit says .