While not knowing anything about the Gumeracha job, but knowing the area, and the police resources, I'd suggest that CFS were called because there was either one solo officer working, and needed assistance, OR there were no local police on, and realistically, it is around a half hour response from the surrounding areas.....in the meantime, should the nursing staff just wait, with their safety perhaps at major risk, for the half an hour, before the police arrive?
Adelaide medic, while I understand where your comment about services not doing the work of other services, is coming from, in practice it could can't work. If each service ONLY did their core business, it would be to the detriment of the public we serve.
While not wishing to make comment on the specifics of this job at Gumeracha, I suspect there may be more to this job than we know
Pip