Ian Strimbeck of Rune Nation LLC talks about the thumb pectoral index, which was originally developed by Craig Douglas of ShivWorks.
We see a lot of shooters firing from the the hip and/or rib cage with the gun flat when practicing shooting from retention. While this method can be useful, it doesn't address the issue of rounds passing through the target and a safer angle to engage from.
Practice at your own risk, and follow all laws in accordance with concealed carry and having to potentially use a weapon in self defense. This information is intended for firearms professionals who work within the scope of the law, and is not intended to be used out of context.
What is the difference in a police and military sniper? Michael Baccellieri of Leupold talks about this, and they breakdown how to adjust your diopter on a magnified scope.
Police and military have very different roles, but roles with a lot of overlap. How they apply their skills, and the considerations of the people in their environment, are what makes them different.