Burress was injured in the early morning hours of Nov. 29 when a .40-caliber Glock he was carrying in his waistband slipped down his leg, and as he grabbed at it, he accidentally pulled the trigger and shot himself in the thigh.
Giants teammate Antonio Pierce drove Burress to the hospital and spoke with police last Friday about the incident.
The Giants suspended Burress for the final four games of the regular season and placed him on the non-football injury list; Pierce remains active.
Goodell said the NFL is allowing the Manhattan district attorney's office to finish its investigation.
"It's a police matter, so we're supportive of the police, and we'll do whatever they need to cooperate," he said. "I expressed that to the mayor and to the chief of police. We're held accountable to the laws of the land, and so are our players."
Samuels out for year
Five-time Pro Bowl left tackle
Chris Samuels is out for the season with a torn right triceps, the latest blow for a Redskins team that has sunk to last place in the NFC East.
Samuels was injured in Sunday night's 24-10 loss to the Ravens.
Right tackle Jon Jansen was also hurt in the game and an MRI yesterday revealed a sprained MCL in his left knee. The Redskins said Jansen has not been ruled out for next week's game against the Bengals.
The dual injuries forced coach Jim Zorn to insert Justin Geisinger - a backup center who hasn't played tackle since college - into the game at tackle in the fourth quarter against the stifling Ravens pass rush. Geisinger struggled - and got hurt as well. He was having an MRI yesterday to address what Zorn called "a potential knee problem."
Zorn said second-year player Stephon Heyer will start the rest of the season at left tackle in place of Samuels, with journeyman Jason Fabini getting first shot at right tackle if Jansen is unable to play. The Redskins plan to promote tackle Devin Clark from the practice squad and sign another offensive lineman to the practice squad.
The Redskins (7-6) have lost four of five and rank 29th in scoring.
