As New Yorkers keep paying tribute to the two NYPD officers gunned down over the weekend, the department is making some changes designed to keep police safe.
Officers going out on foot patrol will now be working in pairs.
Patrols by auxiliary officers have been suspended.
The department is also ramping up security at station houses across the city.
The President of the Detectives’ Endowment Association sent a message out to detectives urging them to be cautious.
Michael Palladino urged detectives to wear their bullet proof vests and suggested staying in groups of three.
In the message, Palladino reminds detectives to be aware of their surroundings saying, "The real threat may not even come from those with whom you are engaged."
Police say officers Wenjian Liu and Rafael Ramos were sitting in their patrol car on the corner of Myrtle and Tompkins Avenues in Bedford-Stuyvesant Saturday afternoon when 28-year-old Ismaaiyl Brinsley approached the car and opened fire, killing them both. He then fled on foot before killing himself in a nearby subway station as police closed in.
Before coming to the city, police say Brinsley shot his former girlfriend in Maryland, and made anti-police statements about the death of Eric Garner from her Instagram account.
NYPD Chief of Detectives Robert Boyce said Sunday that Brinsley had a lengthy rap sheet and had served time, and that his family said he had a history of undiagnosed mental illness.
Boyce also said that Brinsley had a conversation with two man on the street right before the deadly shooting.
"The perpetrator, just prior to the event, he begins the conversation with them, they start speaking and he asks them three things," Boyce said. "He asks them for their gang affiliation, he asks them to follow him on Instagram, and then he says watch what I'm going to do."
Police say Brinsley, who himself had no known connection to gangs, then approached the police car and opened fire.
Authorities say that Brinsley, who was born in Brooklyn and attended high school in New Jersey, was in the city earlier this week -- but it's unclear if he took part in any of the police brutality protests surrounding the death of Eric Garner at the hands of police earlier this year.
The Police Commissioner and Mayor BIll de Blasio have called the broad daylight killing an assassination.
In one tribute, family and friends of Officer Ramos gathered outside of his childhood home in Cyprus Hills to mourn the 40-year-old married father of two.
Ramos' aunt praised members of the community for their support and urged New Yorkers to come together in the wake of her nephews death.
Police Commissioner William Bratton also visited the memorial outside to pay his respects to the fallen officers. He spoke about what it means to people in the neighborhood and the NYPD.
"It's a reflection that the community cares about the cops. The police department, the police I get to lead are very appreciative of the community outpouring. And I just wanted to join in that this afternoon. So its nice to see its here," Bratton said.
Some state lawmakers want to see police cars across the state retrofitted with bullet proof glass.
State Senator Marty Golden, Assembly Woman Nicole Malliotakis and two other elected officials are preparing to introduce the legislation in the next session.
It would require all vehicles to have bullet-proof glass to better protect the cops that keep the city safe.
The glass would be installed across the state over time, starting with the NYPD.
Elected-officials propose using part of the $5.1 billion state surplus to pay for the retrofit.