ShotSpotter

The New York City Police Department (NYPD) actively monitors public activity in New York City, New York, United States. Historically, surveillance has been used by the NYPD for a range of purposes, including against crime, counter-terrorism, and also for nefarious or controversial subjects such as monitoring political demonstrations, activities, and protests, and even entire ethnic and religious groups.
These Cameras are to give a sense of fear against any criminals willing to commit crimes.
there are also more hidden devices on top of buildings known as ShotSpotter's. These devices are used to detect gunfire and pinpoint the location 
Active
----These cameras can be found almost everywhere in the 3 main areas
Locations Are
ATKIN BLVD and Lott Ave, Loring
Belmont and Jerome Ave, New Lots Junction
Dumont Ave and Cozine Ave, New Lots Junction (first ever display of these cameras)
Piktin Ave and Essex St, Hollis
Dewitt St and Essex St, Hollis 
Kelgo Lenox Ave and Lott Ave, Kelgo Lenox
A Street and Sullivan Pl, Hollis
Euclid Ave and Sullivan Pl, East New York
Liberty Ave and Sullivan Pl, East New York (INACTIVE)
Avenue D and Rockaway Pkwy, Canarsie
Foster Ave, E 96 Street, Canarsie
Foster Ave, E 95th Street, Canarsie
Rockaway Pkwy, Glenwood Rd, Canarsie
Rockaway Pkwy, Flatlands Ave, Canarsie
Glenwood Rd, Juther Place, Cortelyou Flatbush
Hawthorne St, Erving St, Cortelyou Flatbush
Troy Ave, President St, Flatbush
Planet St, Juther Place, Flatbush
----
New ShotSpotter Prototypes 
it is said by February of 2021 NYPD will receive its new ShotSpotter Models,
One has been installed but no fully activated, on Liberty Ave.