The Associated Press

NEW YORK (AP) -New York Giants linebacker Antonio Pierce is testifying before the grand jury investigating a gun charge against Plaxico Burress.

Pierce arrived Thursday at a lower Manhattan courthouse, a day after the grand jury heard testimony from Burress, a former Giants wide receiver.

Burress has pleaded not guilty to illegal possession of a weapon. He shot himself in the thigh at a Manhattan nightclub in November.

Burress was with Pierce, who still could be charged. Giants President John Mara has defended Pierce's actions, which included taking Burress to a hospital under an assumed name.

Burress caught the winning touchdown in the final minute of the 2008 Super Bowl. The Giants released him in April and he has not signed with another team.