Bill Cosby faced the start of a sentencing hearing Monday at which a judge will decide how to punish the 81-year-old comedian who blazed the trail for other black entertainers and donated millions to black causes but preyed on at least one young woman and perhaps many more. 

Bill Cosby's wife called Thursday for a criminal investigation into the suburban Philadelphia prosecutor behind his sexual assault conviction, saying the case that could put the 80-year-old comedian in prison for the rest of his life was "mob justice, not real justice" and a "tragedy" that must be undone. 

The jury in Bill Cosby's sexual assault retrial has found the comedian guilty of sexually assaulting a former Temple University women's basketball administrator at his suburban Philadelphia mansion in 2004.