List of NYPD Police Killed On Duty

[From article]
the sad history of police partners being assassinated in uniform. It’s happened seven times since 1971, Bratton said. In some instances, the officer was alone, when he was targeted for wearing blue.
[. . .]
The Black Liberation Army fatally targeted 16 law enforcement officers around the nation, over the course of more than a decade.
[. . .]
Edward Byrne was a rookie, just 22 years old, and on the job six months.
He was guarding the home of a drug witness on Inwood Street, when four hired guns snuck up to his patrol car and one distracted him.
[. . .]
Cobb told investigators his team was paid $8,000 to carry out the hit by a jailed drug enforcer, Howard “Pappy” Mason.

http://pix11.com/2014/12/20/targeted-for-their-badge-the-disturbing-43-year-history-of-assassinations-of-nypd-cops/

Targeted by their uniform: The disturbing 43-year history of assassinations of NYPD cops
POSTED 10:34 PM, DECEMBER 20, 2014,
BY MARY MURPHY,
UPDATED AT 11:45PM, DECEMBER 20, 2014