The New York Giants placed wide receiver Plaxico Burress on the non-football injury list and suspended the player for four games Tuesday.

That ended Burress's season a day after his arraignment on gun charges in connection with his accidentally shooting of himself on Friday at a Manhattan nightclub with a gun he was not licensed to carry.

Burress was freed Monday on $100,000 bail after being arraigned on two counts of second-degree weapons possession. The player then returned to Giants Stadium Tuesday morning for physical therapy.

Hours later, Burress was fined and suspended for what the Giants called "conduct detrimental to the team for multiple and repeated violations of club rules."

The team also said tests showed Burress would be unable to play in any case for four to six weeks.

Meanwhile, investigators will continue to look into the involvement of Burress' teammates, linebacker Antonio Pierce and runningback Ahmed Bradshaw. Pierce took Burress to the hospital after the incident and now the NYPD is looking into whether he was involved in a cover-up.

Pierce's attorney said the linebacker will attend practice Wednesday but will cooperate with the investigation, saying, "he acted responsibly given the nature of the rather extraordinary circumstances he found himself in... trying to make split-second decisions while it appeared to him that his friend may be bleeding to death."

The NYPD is also investigating whether Bradshaw was at the club on the night of the shooting.

If convicted, Burress could face from 3.5 years to 15 years in prison for each count.

Yet a defense attorney not working on the case said Burress could see a much lighter sentence.

"If he's found guilty of criminal possession of a weapon without the intent to use unlawfully against another, just the possession of the weapon, maybe for his own protection, then he's facing mandatory jail time, minimum two years," said attorney Marvyn Kornberg. "Except, the law provides, the judge can find under those circumstances, under that count, extenuating circumstances, and can, if he wants, sentence him to probation."

Meanwhile, the hospital employee who failed to report Burress' gunshot wound to authorities has been suspended.

The employee has been identified in reports as 44-year-old Dr. Josyann Abisaab.

Police have been looking into why New York-Presbyterian Hospital/Weill Cornell Medical Center failed to report incident. The hospital issued a statement saying failure to report a gunshot wound violates its policies and procedures, and had promised disciplinary action.

Mayor Michael Bloomberg said Monday he does not think anyone should be exempt from the state's tough gun laws. He says giving special treatment undermines the work police have done to take the guns out of the hands of criminals.

"It is designed to send a message - don't carry a gun, period, end of story," said the mayor. "And I've said yesterday, that law should apply to everyone."

The mayor was also furious that the New York-Presbyterian staff did not report the shooting.

At Tuesday night's Sportsman of the Year event, run by Sports Illustrated in Chelsea Manhattan, Giants quarterback Eli Manning said he was concerned about Burress's health when he first heard of the shooting and said Burress has full support from the team.

"Obviously, it's a shame and I think right now our biggest concern about Plaxico is that hopefully he doesn't have to… any legal troubles will be up to a minimum,” said Manning. “You never want to see a teammate and friend go through this situation. So, you know, we're just praying that this thing works out for the best."

Manning also said he thinks it's a shame Burress won't be able to play for the rest of the season.

Burress is due back in court on March 31.