Bendo,
You are correct the Force Science Institute is doing really good things for the LEO community and helping juries to understand deadly force encounters and issues.
They explain on a scientfic level all the unexplainable stuff that people say they see in deadly force encounters.
Check them out here at (add
www.) forcescience.org
I believe one should shoot the threat until the threat is no longer a threat. Stop shooting when the threat is no longer a threat. The only time I would deviate from this is if there where multiple attackers.
Just my .02 cents.