http://www.interfire.org/res_file/pdf/Tr-077.pdf - Jan 19 1995 - 4 firefighters killed - new trunked radios - IC had to monitor 2 channels - radios would switch to emergency channel when emergency button activated - IIRC they had dead spots
http://www.nfpa.org/assets/files/PDF/SeattleWarehouse.PDF - 1995 - 4 firefighters killed - poor radios - this is the NFPA summary of their report