Bernard Madoff is unwell. The ponzi schemer is serving a 150-year sentence in a federal prison in Butner, N.C., but has been moved to a low-security medical center inside the prison for an unspecified illness. A prison spokeswoman said Madoff was moved to the hospital on Dec. 18, but has not disclosed what he is being treated for. Earlier this year, prison officials stated that Madoff had not been diagnosed with cancer. The Butner facility treats patients suffering from medical and mental health problems that require ongoing supervision, and according to the 2008-2010 edition of the Federal Prison Guidebook, has cancer treatment as one of its specialties.