Most likely 154.280 Mhz VHF analog. I heard that as well.
EDIT: Miami Co Correctional has their own SAFE-T site, but it doesn't allow non-IDOC talkgroups, so when the fire dept arrives there they may not have good coverage from the Peru SAFE-T site to make contact on one of the 800 regional mutual-aid channels; or their volunteer FDs may not have a bunch of 800Mhz portable radios. I heard Miami Co Disp ask the FD personnel which channel they wanted Lutheran Air on, and they said Fire Mutual Aid. I apparently don't have that channel in my VHF scanner because I never heard Lutheran Air contact the FD.