st louis

3 shot, 1 dead in what was originally reported as an active shooter at the Applebee's on St. Charles Rock Rd. in St. John, MO. Was interested to hear how it went down on the triage side of things on Fire/EMS-North, but since it went out as an active shooter, the ops were on Tac 81E (Encrypted)...

I just got a Uniden BCD396XT digital scanner and have no idea how digital trunked systems work. I'm trying to program STL city P25 public safety (Fire, Police, EMS) and don't know what a talkgroup vs a site vs system frequencies are. Could someone please help? Thanks!!!