The instant the bullet struck her in the back of the head, she was unconscious, never suffered one second. >> the davises built churches in mexico for 38 years, but because of drug violence, sam davis says the situation today is impossible. >> the investigation into the davis death is being hailed entirely by mexican police and they have a conviction rate of under 2 percent. martha, back to you. martha: boy, what a story and what a remarkable statement from her husband. steve harrigan, thank you very much for bringing thattous. good work. bill: similar story, arizona's immigration law, could i...