[QBFimi]

>> The Tueller Drill is a self-defense training exercise...

Yes, and it is usable in a court defense IF you had knowledge of it - PRIOR TO - your use of a firearm.
“Prior to” - got that, fellow FReepers?

[Uncle Miltie]

Bookmark the wikipedia page for the Tueller Drill here:

https://en.m.wikipedia.org/wiki/Tueller_Drill

It demonstrates your prior knowledge so that you can use it in your defense.