I'm watching the Northville site on Pro96Com now. It's operating in site trunking mode, which basically means it's running stand-alone, with no connection to the rest of the system.
Unfortunately in this mode, all of the access controls for the site are disabled, and any radio may affiliate to it. I'm currently showing 80 affiliations on the site, the majority of which are Detroit PD radios. Since the site is not connected to the rest of the system, these radios are in a "black hole" unless something happens to get them to affiliate to another site. They are cut off from their dispatchers, unless somehow the dispatchers have a radio affiliated to the site as well.
Mike