From my Strategies, Tactics, and Options for Personal Protection Class:
Triumvirate of Success in Decision-Making (adapted from David Brin’s The Uplift War).
In no particular order:
• Consequences [nee Cost and Caution] – financial, political, and physical.
• Decency or Civility [nee Propriety] – honor and nobility. Actually being ‘the good guy.’
• Courage [nee Beam and Talon] – Aggressive spirit, daring and seeking out opportunities.
Failure to achieve some balance of the three factors significantly increases the possibility of a catastrophic failure to achieve the objective. In this incident, there was no sense of decency or civility among the ‘Good Guys.’
Unintentional Discharge (causing the death of an innocent) – Serious Mistake
Mistaken Identity Shootings – Serious Mistake
After the fact beatdown of an innocent party – Serious Mistake
Most likely spending a long time in a Brazilian prison – Negative Outcome.
What gets people in trouble is usually not marksmanship but instead Serious Mistakes in the Decision-Making process. There are exceptions but that’s the general rule. The reason we become proficient with firearms is not because the marksmanship problem is likely to be difficult but rather to avoid having the tool (firearm) become our focus in the moment instead of the situation.
Tactical Professor books (all PDF)
Serious Mistakes Gunowners Make http://seriousgunownermistakes.com
Indoor Range Practice Sessions http://indoorrangepracticesessions.com
Concealed Carry Skills and Drills http://concealedcarryskillsanddrills.com
Advanced Pistol Practice http://bit.ly/advancedpistolpractice
Shooting Your Black Rifle http://shootingyourblackrifle.com
tacticalprofessor 
Hi Claude,
I noticed in your response to my email last week about the APP you posted my phone numbers from my signature on your website. Would you please edit that post to remove those numbers for me?
Regards,
Stephen Embrey
“The price good men pay for indifference to public affairs is to be ruled by evil men.”
Done.
Winner of gun internet for the month:
“The reason we become proficient with firearms is not because the marksmanship problem is likely to be difficult but rather to avoid having the tool (firearm) become our focus in the moment instead of the situation.”