I mean this is super easy to check all of the state police helicopters always fly with their transponder on... when were they chasing these drones, what date? The one over my house back on the 18th flew from Sommerset airport, into Picatinny, around the area and back...never went near the ocean....So I got some pretty reliable info on this last night.
While the drones appear to be following a grid search/travel pattern, they are clearly monitored because they have changed course in response to being spotlighted by patrol cars, NJSP helicopters. They also formed a tight pattern over RVCC and hovered while NJSP was trying to land for a motor vehicle accident on Route 22.
NJSP helicopter followed for hours last week and the drones eventually head east over the open Atlantic. NJSP followed until they were low on fuel and had to turn around. Reliable reports of the biggest drones being Smart-car sized.
The working theory is that they are coming from a ship in international waters, possibly a Chinese cargo vessel.
Replayed at 40x speed so the lines are a little jagged

Its easy enough to filter the SP helicopters, they only use a few types.
And if someone is telling you that the SP helicopters are flying around in the dark following drones WITHOUT their transponder on, I call total bullshit.