OK, I stand corrected. The controller has indeed been shut down. The odd thing is that I monitored this system during my lunch hour. During that time, I heard the Transit Police, UDM Security, Executive protection details, Some DPW traffic, and what sounded like the mail room somewhere.
From what I can tell, there are about 4 repeaters operating in failsoft mode at the moment. At least two of the Frequencies have Oakland County's OpenSky operating (probably NOT from the Detroit Locations).
The following Frequencies are in FailSoft mode (Constant carrier, beep tone every few seconds):
851.3375
854.3625
854.4125
855.3375
Mike