Many questions are being raised after a New York City police officer, accused of getting behind the wheel drunk and causing a crash that killed a Brooklyn woman, passed a blood test with flying colors.

According to investigators, Police Officer Andrew Kelly refused to take a breathalyzer and blood test at the scene of the fatal car crash that killed Vionique Valnord early Sunday morning. The officers who responded to the wreck reportedly gave Kelly gum and water at the scene, fueling the notion of a possible cover-up.

It was more than 7 hours after the crash, that Kelly was finally administered a blood test, officials said. Law experts believe that the test results may very well damage a case against the accused officer.

In light of the news, Mayor Bloomberg lashed out against the police officers involved in the possible cover-up, calling it "reprehensible."

"I just wanted to address a terrible tragedy that is being actively investigated by the NYPD," Bloomberg told the New York Post. "It's a tragedy that deserves the closest of scrutiny, and if true the allegations of a DWI hit and a cover-up are reprehensible."

Kelly, a seven-year NYPD veteran with Brooklyn's 63rd Precinct, has since pleaded not guilty to the charges of driving while intoxicated and vehicular manslaughter. He has been suspended from the force, as the investigation continues.

The test results surfaced just a day after a second officer, who has yet to be identified, was suspended in connection with the fatal crash. According to NYPD officials, the officer was in the passenger's seat of Kelly's vehicle at the time of the crash. The cop was suspended after fleeing the scene after the crash, officials said.

Both officers were off-duty at the time of the incident.

Valnord, who was struck by Kelly's vehicle while hailing a cab, was pronounced dead on arrival at Kings County Hospital.