This is getting a lot of discussion on another forum, and apparently the shots are audible on the dispatch tape as the cops key up their mikes to report being on scene. HOWEVER, the 911 operator did not pass that information on the homeowner, and thus was in error.
I went to a burglary in progress call a few days ago (turned out the resident's response probably scared off the possible intruder, or the door alarm's batteries were failing, or something). I did not and would not ask radio to tell some scared 65-ish woman to put away the gun. She knew we were there (she saw me go by, as her house # was hell to read) and it was holstered. It was a judgment call.
That is not at all like this home invasion. It was clear something bad was happening, and anyone who thinks the incident is over simply because the offender has been shot is a fool. It is not sufficiently controlled until the cops have cuffed the offender at a minimum. Big boys' rules, folks - we can yell to each other if need be, relay messages by phone, etc.