(Attleboro, MA)  -- Former New England Patriots tight end Aaron Hernandez is formally pleading not guilty to first degree murder and weapons charges.  He was arraigned today in a Massachusetts courtroom.  He's accused of shooting to death semi pro football player Odin Lloyd in June.  Odin's corpse was discovered a short distance from Hernandez's home.  Hernandez remains jailed without bond while he awaits trial.