A second officer, Wilbert Mora, 27, remained in critical condition, the New York Police Department said.

Police said McNeil -- who had a pistol with a high-capacity magazine -- was confronted by a third officer at the shooting scene after he tried to run and was struck by two bullets.

Mayor Eric Adams said Monday the suspect had another gun under his mattress.

"He could have emptied out his 40 (bullets) and still had another automatic assault weapon for every responding officer who responded," Adams said at a news conference.

The mayor said he believed the actions of the third officer saved other lives.

Also Monday, Adams said the city would put more officers on the streets as part of a plan to fight the brutal rise in crime and gun violence in New York.

The gun used in Friday's shooting, a Glock 45, was stolen from Baltimore in 2017 and had a magazine that can hold up to 40 additional rounds, according to NYPD Chief of Detectives James Essig.

Five NYPD officers have been shot this month, police said, with Rivera the first to lose his life.

Officer wanted to improve community relations

Rivera, who entered the police academy on November 2, 2020, according to a source with knowledge of the officer's records, had said his first-hand experience with the controversial policy of stop and frisk and the department's effort to bolster community relations ultimately propelled him to join the department.

"I remember one day when I witnessed my brother being stopped and frisked," Rivera wrote in an undated letter to his commanding officer that was penned while he was in the police academy.

"I asked myself, why are we being pulled over if we are in a taxi," Rivera wrote.

Rivera had said his community of Inwood was at odds with the NYPD but soon saw the department make efforts to change its ways, according to the letter obtained by CNN.