In the past, they have used G-EVENT7, which is TG: 1016. However, this year with the city of Detroit being fully operational on the MPSCS, they may use additional Event talkgroups. Likewise, they may use some of the I-TAC frequencies, especially if MSP brought in their mobile command post. These analog freqs are:
I-TAC1: 866.5125
I-TAC2: 867.0125
I-TAC3: 867.5125
I-TAC4: 868.0125
73s
Ron