The incident happened November 13 at a halfway house on Hughes Avenue in the Tremont section.
The video shows the deadly confrontation between two NYPD officers and the man, who police said already stabbed two female security guards. Both officers were wearing a body cam at the time.
The first officer, identified as Officer Shawn Lauftus -- an 11-year veteran -- fired six times after telling the man to drop the knife 19 times.
The second officer, identified as Nicole Krause -- a 1 1/2-year veteran -- fired three times.
Watch the full video here (we freeze the video just before you see the man collapse):
The department said the officers fired after the man, identified as 67-year-old Cornel Lockhart, stepped toward them. He died at the scene.
NYPD officials are now investigating if the shooting was justified.