NYPD Commissioner Bill Bratton Warns Officers: Cop Funerals 'About Grieving, Not Grievance'

Bill Bratton sent a memo telling officers to respect Mayor Bill de Blasio.

— -- "A hero’s funeral is about grieving, not grievance."

That's the warning NYPD Commissioner Bill Bratton has sent to officers who plan on attending the funeral for slain officer Wenjian Liu on Sunday.

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"On Sunday, we will gather together again, with the rest of New York City and law enforcement officials nationwide, to mourn for Detective First Grade Wenjian Liu. We gather to support his parents, his widow, and everyone who is there to remember a life tragically cut short. The assassination of Detectives Liu and Ramos was an attack on us all. As a cop, one who lived and worked through the assassination threats of the 1970s, I understand that emotions are high. I issue no mandates, and I make no threats of discipline, but I remind you that when you don the uniform of this department, you are bound by the tradition, honor and decency that go with it." Bratton added.

The officers were killed on Dec. 20 as they sat in their patrol car on a Brooklyn street. The shooter, Ismaaiyl Brinsley, later killed himself after posting on social media that he wanted to kill cops.

Police unions have blamed Mayor Bill de Blasio for creating a anti-police climate for allowing people to freely protest the recent grand jury decisions in Ferguson and Staten Island, something the mayor’s office has vehemently denied.