(Brooklyn, NY)  --  Former Trail Blazer guard Sebastian Telfair is being sentenced to three-and-a-half years in prison for illegal gun possession.  Brooklyn's district attorney said Monday the mandatory prison sentence is required by law and he's now been held accountable for his conduct.  The 34-year-old Brooklyn-native was a 2004 first-round pick of the Blazers, averaging 8.1 points per game over two seasons.