New Video Emerges of NYPD Police Shooting Scene

NYC Mayor Bill de Blasio addresses the public about Ismaaiyl Brinsley's ambush of two Brooklyn police officers.
2:54 | 12/23/14

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Transcript for New Video Emerges of NYPD Police Shooting Scene
Now it call for calm and an end to the anti-police protests in New York until after the funerals for the two officers executed at point blank range over the weekend. Police using this surveillance video to map out the time line in the hours before the attack. Linsey Davis is here with the latest. Reporter: Good morning. Baltimore police have talked to brinsley's ex-girlfriend who he allegedly shot in the stomach on Saturday morning. She's in critical condition. He gave no indication that he intended to commit violence against police officers. This morning, dramatic cell phone video revealing the time they tried to save the officers after they were shot in their patrol car Saturday. This is a police try to piece together the gunman's movements just before the ambush. According to the NYPD, this newly-released surveillance footage shows brinsley about two hours before the shooting. His gun, they say, in that bag. After that, no sign of brinsley until he opens fire. We have a very disturbed young man here. Reporter: He attended a protest in New York City earlier this month rally against alleged police misconduct. While police say brinsley didn't directly participate in the protest, he did reference garner and Michael brown in an instagram post discovered one hour before the ambush. They take one of ours, take two of theirs. But on Monday, his daughter rejecting violence in her father's name. Joining the hundreds coming to pay respects to the fallen officers. I have to come out and let the family know we stand with them. Reporter: New York mayor bill de Blasio and William Bratton visiting with the victim's families. He had offered to fill in on the shift for a coworker who was running late the day he was killed. Our family. We will stand together and thank you. Reporter: Bill de Blasio has been criticized by police officers for being anti-cop. They turned their backs Saturday night. He's urging protesters to hold off until after the officers are laid to rest. The assassination was an attack on the city of New York as a whole, on our values, on our democracy. We can not tolerate such attack. Reporter: The funeral for officer Ramos is going to take place on Saturday. Both Al Sharpton and Eric garner's youngest daughter say it was metal health and not as a result of anything the mayor said or supported. Thanks very much.

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

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