Nguyen was also wounded in the right arm during the 4:35 p.m. shooting at 149 Ridgewood Ave. near Essex Street where the cop and his partner were responding to a 911 call of an emotionally disturbed person.
"As the first officer approached the rear bedroom, the subject fired several shots, striking the officer several times", O'Neill said.
Multiple shots are accepted to have been discharged, and another slug may have hit the officer in the chest or arm, as per police.
Police say after being hit, the officer did not return fire.
He and different officers had been reacting to a report of a sincerely bothered individual when a man opened fire, police said.
When officers entered the building, they found the suspect dead from an apparent self-inflicted gunshot wound, and recovered a semiautomatic weapon and a revolver, along with ammunition.
Mayor Bill de Blasio said: "This young man was definitely saved by his vest, made all the difference here". His attacker killed himself after an armed standoff in Brooklyn, police said.
The officer was treated by the medics with him, police said.
The New York Daily News and other local media identified the man as Andy Sookdeo.
"Thank goodness, the officer is gonna be fine", the police commissioner said.
"What could have been just another day, just another call turned into something much worse", the mayor said.
The 30-year-old officer works out of the 75th precinct and has two years on the force.
The suspected shooter was holed up in the home for several hours as police converged on the area. He's a fearless young man.
As for the officer, he was rushed to Jamaica Hospital and it already on the mend.