The Helicopter can use any of the Newark PD channels. Remember that in the Class B Air Space ( City of Newark ) the helicopter on the aviation side uses 127.850 MHZ AM. Now overnights at times the tower pulls all air traffic on the Newark Tower freq 118.300
I hear them on SPEN1 a lot when they are helping out the local police departments. Also remember the radios in the choppers are field programmable. They can come up on any frequency under the sun. I love listening t o 127.8500 AM, that's also- where the news choppers hang out!