The New York Police Department had planned to deploy drones for the first time to monitor crowds during New Year's Eve festivities, but the plans were thwarted by rainy weather.
In this photo provided by the New York City Police Department, marine units from the NYPD Special Operations unit come to the aid of passengers after the seaplane they were flying in made a hard landing in the East River, Friday, July 21, 2017. (New York Police Department via AP)
In this photo provided by the New York City Police Department, marine units from the NYPD Special Operations unit come to the aid of passengers after the seaplane they were flying in made a hard landing in the East River, Friday, July 21, 2017. (New York Police Department via AP)
New York Police Department (NYPD) Commissioner James O'Neill listens during a new conference after a swearing-in ceremony for new police recruits entering the Police Academy, Thursday, July 6, 2017, in New York. O'Neill spoke at the news conference also of a shooting death of a New York Police Department officer who was ambushed Tuesday night. (AP Photo/Bebeto Matthews)
New York Police Department (NYPD) Chief of Detectives Robert Boyce, left, and NYPD Commissioner James O'Neill, right, hold a news conference after a swearing-in ceremony for new police recruits entering the Police Academy, Thursday, July 6, 2017, in New York. Boyce and O'Neill spoke at the news conference also of a shooting death of a New York Police Department officer who was ambushed Tuesday night. (AP Photo/Bebeto Matthews)
This undated photo provided by the New York Police Department shows officer Miosotis Familia, who was shot to death early Wednesday, July 5, 2017, ambushed inside a command post RV by an ex-convict, authorities said. The gunman was killed by police about a block away. (NYPD via AP)
NYPD Detectives Chief Robert Boyce, left, and ATF New York Field Division Special Agent in Charge Ashan Benedict speak to reporters during a news conference near the scene of an unsolved 2016 explosion in New York's Central Park, Wednesday, June 28, 2017. The New York Police Department and federal officials are offering up to $40,000 in reward money for information that leads to an arrest in the explosion last summer in Central Park that injured a tourist. (AP Photo/Mary Altaffer)
ADVANCE FOR USE MONDAY, APRIL 10, 2017 AT 1 A.M. EDT AND THEREAFTER-This undated image provided by the New York Police Department shows Anthony White, the volatile, 21-year-old roommate of Deven Black in an East Harlem shelter for men with mental health problems. Police said White killed Black, slitting his throat, but White never answered the allegations himself; he fled when a security guard opened a door to find Black bleeding on the floor, police said. White's decomposed body was found in the Hudson two months later. (NYPD via AP)
FILE - In this Oct. 20, 2011 file photo, NYPD Detective Rick Lee, right, poses for a photographer in New York City's Zuccotti Park. Lee, 51, who became an internet sensation as the "Hipster Cop," during the Occupy Wall Street protests for his fashionable wardrobe, is letting go of something he's been wearing for 25 years: his badge. Lee’s last official day with the New York Police Department before retirement is Friday, Feb. 24, 2017. (AP Photo/Seth Wenig, File)
FILE - In this Oct. 20, 2011 file photo, NYPD Detective Rick Lee talks to a pedestrian in New York City's Zuccotti Park. Lee, 51, who became an internet sensation as the "Hipster Cop," during the Occupy Wall Street protests for his fashionable wardrobe, is letting go of something he’s been wearing for 25 years - his badge.Lee’s last official day with the New York Police Department before retirement is Friday, Feb. 24, 2017. (AP Photo/Seth Wenig, File)
FILE- In this Oct. 21, 2011 file photo, NYPD Detective Rick Lee, center, walks with protesters in New York City. Lee, who became an internet sensation as the "Hipster Cop," during the Occupy Wall Street protests for his fashionable wardrobe, is letting go of something he's been wearing for 25 years: his badge. Lee's last official day with the New York Police Department before retirement is Friday, Feb. 24, 2017. (AP Photo/Seth Wenig, File)
This photo released by the New York Police Department shows a bullet proof vest recovered during a police investigation, Thursday, Jan. 5, 2016 in the Staten Island borough of New York. Authorities say two New York City police officers shot and wounded a man wearing the vest. (NYPD via AP)
This photo released by the New York Police Department shows an AR-15 semi-automatic rifle recovered during a police investigation, Thursday, Jan. 5, 2016 in the Staten Island borough of New York. Authorities say two New York City police officers shot and wounded a man in the Charleston neighborhood. Officers say during the search of the nearby woods they recovered the rifle and several spent shells. (NYPD via AP)
This image from security video provided by the New York Police Department, from a security camera at a bodega at 635 Watkins St. in the Brooklyn borough of New York, shows three men who are wanted by police in connection with the gang rape of an 18-year-old woman who was walking in the nearby Osborn Playground with her father later the same evening. Authorities say five men approached the pair. They say one of the men pointed a gun at the father and ordered him at gunpoint to leave before they took turns raping the woman.The father returned with two police officers, but the attackers fled. (New York Police Department via AP)
This file photo provided Friday, Aug. 7, 2015, by New York Police Department shows packets of synthetic marijuana seized after a search warrant was served at a newsstand in Brooklyn, N.Y. (AP Photo/New York Police Department) ** FILE **
In this Monday, June 29, 2015 photo provided by the New York Police Department, a man gets away after he robbed the Santander bank in the Queens borough of New York. After receiving over $1,200 in bills, police say the suspect then fled westbound on Broadway in the wheelchair. He remains at large. (NYPD via Associated Press)
This combination made from photos provided by the New York Police Department shows officers Rafael Ramos, left, and Wenjian Liu. (AP Photo/New York Police Department, File)
A flier circulating on social media asks people to assemble Dec. 19 in front of City Hall from 5 p.m. to midnight to support the New York Police Department. (Facebook/Thank You NYPD)
New York Police Department officer Joshua Jones wears a VieVu body camera on his chest during a news conference, Wednesday, Dec. 3, 2014 in New York. The nation's largest police department is beginning with an experimental deployment of the cameras which will record encounters between police and civilians. (AP Photo/Mark Lennihan) **FILE**