as he lunges toward the cop, with cops yelling at Bottom to  drop the knife. 

Sgt. Dennis Dooley, who was stationed on the bridge's roadbed, then fired one shot, which struck the maniac.

Cops raced to get Bottom off the side of the bridge after he was shot and begged him to drop his weapon.

He was rushed to Bellevue Hospital where he was pronounced dead.

5 Bottom said,  I want to die, I want you to kill me,'  according to NYPD ESU Chief Gerad V. Dowling. NYPD

It was unclear from the footage what Bottom was telling the cop, but ESU Chief Gerard V. Dowling previously told reporters:  He stated,  I want to die, I want you to kill me, I have a bomb, you're going to make me do something bad to the cops. 

The NYPD said its Force Investigation Division will continue to investigate and analyze the fatal shooting.