I beg your pardon but,
I would have rather read these headlines in the news:
Police helicopter emergency lands after engines stopped producing power. All persons on board and on the ground are safe.
Engine power is not required to control a helicopter in flight, rotor RPM IS. Therefore, the loss of engine power could be a symptom of loss of fuel but not loss of rotor RPM. Control of the rotor is partially in the collective pitch system as you know i`m sure.