RCMP trunked or linked repeater
I am no expert on this, but I didn't think that RCMP were trunked other than their linking system. It may help to give a frequency or other identifier that you saw on your scanner. This would help narrow down what services this may have come from and where. I see you are in Innisfail so if RCMP, Tac 6 may be simplex so unless closs to Innisfail may not have heard anything simplex down in the valley that part of Red Deer has. When I have been in Innisfail, I have been able to hear RCMP repeaters from Rocky, and Red Deer in the North, down to Olds, Didsbury in the south. So if any of these went simplex outside Innisfail, unless you have a good and high antenna, probably would not be able to hear them. But a little more information, like a frequency, would help narrow the service down more. If you have not already looked, the Database under Alberta Provincial Agencies, Public Safety Police will give you the RCMP frequencies. The same Database under Red Deer will give you other services there as well. But the frequency you heard this on will may help someone narrow it down.