Here are some better pics of that ambulance in question:
https://flic.kr/p/AKnEFP
I've been told that the "Police" on the front of the ambulance allows the Police Officer (if inside the ambulance) to preform traffic stops and other police duties.
If not in the ambulance or
EMS Flycars, then Police Medics are assigned to regular patrol duties in vehicles like such:
In greenburgh PD, any vehicle with a vehicle ID in the 70's, is
EMS related. For Example: Car 75 is a Civilan Medic in a Flycar. Car 75 is the
ALS Coverage for the VAC's within the Town of Greenbugh (Elmsford VFD/
EMS, Arsdley VAC, Tarrytown VAC, etc...). Car 70 is the
EMS Medic Supervisor (civilian). Car 71 is a Police Medic. Car 77-79 are Ambulances. Just to name a few.