Prosecutors in Michigan are expected to announce today whether they will charge a white man who shot an unarmed African-American woman on his porch. Family members say 19-year-old Renisha McBride was seeking help after a car crash when she was killed by a shotgun blast to the face. A toxicology report released Thursday showed McBride had a blood alcohol level of twice the legal limit to drive, but supporters say the results are irrelevant. They have called for toxicology results on the shooter, who claimed his gun accidentally fired at McBride.