NYC Cop Killer Advertised Intentions on Social Media

Hours before shooting two NYPD cops, Ismaaiyl Brinsley posted that he was "putting wings on pigs today."
2:07 | 12/22/14

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Transcript for NYC Cop Killer Advertised Intentions on Social Media
Michael brown? Officials say the suspect left media including shoot the police. Here's David Wright. Reporter: On the lam after shooting his ex-girlfriend in Baltimore, he posted this ominous warning on instagram. I'm putting wings on pigs today, they take one of ours, let's take two of theirs. #Shootthepolice and Eric garner and Michael brown. On Facebook, he posted an image of the murder weapon. Noting, this may be my final post. Many in the NYPD laid part of the blame on New York City's mayor. After the ground jury exonerated the police officers, he expressed is think with the protesters, not the police. Just yesterday, when the mayor visited the hospital to pay respects to the families, other policemen turned their backs on him. Do you think the feelings are understandable? Yes. I think the emotions are understandable. I think the reality is that the mayor did run against policing and police practices in his campaign. Reporter: Today, the mother of Eric garner issued this public plea. If anyone is standing with us, we want you to not use Eric garner's name for violence. We're not about that. Reporter: Today, we learned that brinsley had at least 19 prior arrests and according to his family, a history of undiagnosed mental illness. And New York's mayor said that the killing of a police officers tears at the very fabric of a community. Thank you. We move on to the stormy

This transcript has been automatically generated and may not be 100% accurate.

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