An Ethiopian immigrant with a history of mental health problems is in custody after being accused of mailing a letter with HIV-tainted blood to Barack Obama when he was president-elect, according to court records. Saad Bedrie Hussein told investigators that he is an admirer of Obama and that the letter — containing his photo, an admission ticket to Obama’s election night victory party in Chicago’s Grant Park and six index cards containing writing and reddish stains — was his way of seeking government help and tickets to Obama’s inauguration