I don't pretend to know the answers to the dilemma this kind of thing puts doctors in, or how to reconcile it with RKBA (which I'm very firmly committed to) and other civil liberties that we all treasure. It's perplexing. I only posted that fact because it came to my mind when I read the article.
The lady in Colorado, however, also felt she was in danger and so in this case, there was no dilemma.
Whitman had a brain tumor in the region that effects strong emotion. Received poor medical care and his problem went undiagnosed - we all know what happened next. The sad fact is that he was as much a victim as the people he killed.