I only read the article at the link you posted and did not see anything about her being alone or not, and I have not looked for anymore information. It does say 'shots were fired', and I will say that of course, if she shot at one or more LEOs, it was bound to go that way. Also, nothing in the article about how long it went on, it could have been a 12 hour stand-off. The article did mention that it happened in an apartment rather than a private (individual) home so no doubt the neighbors were of concern; I have no idea how long something like an entire apartment building should be cleared of residents while the authorities negotiate with an individual in circumstances such as this. A day? A week? 10 hours?
In my mind we just do not know enough to make any kind of call or even lean in any direction regarding who may have acted properly or not. But this is why we have the systems in place that we do regarding an investigation, evidence gathering and review, etc. Now as far as the implied cover- up, well that is a very different matter and again I would not jump to that conclusion unless again, there was evidence of that happening either for the current incident or some history of it in the recent past, and I mean a chain of it, not one incident 14 years ago, for example.
Not saying you are not right, just that I am not able to form any opinion without a lot more information.
We had a barricaded, stand-off in this area last year; it lasted 36 hours and ended with the man being taken into custody. Certainly the LEOs did not overact in that case, acted properly as far as I know and gained the best possible outcome given the situation.
http://turnto10.com/news/local/police-continue-standoff-at-coventry-homeBrian
All info at this time says she was home alone. Seems to me the Swat team was late for supper or something and forced the escalation. Probably never know since we'll only hear one set of facts.