Check out the write ups on https://armedcitizensnetwork.org/ Look for Larry Hickey
Also Chris Cox in the American Rifleman described an incident (details foggy in my mind, can't find a write up) where a guy went to the place of a renter due to some dispute. He got into an argument that turned physical and shots were fired. One shot had a significant delay in time, seconds IIRC (duh?) and was claimed to be unnecessary. That the shooter was a competitor was part of the prosecution. That's all I got on this one. I read it years ago.“The practice jury said that Larry had too much training
and he should have known better. So how much we were going to get into [his training] was always very difficult to figure out because it was absolutely important to show Larry as this person that isn’t just out there with a gun and doesn’t know how to handle it.”
….the prosecutor would have forced their hand at trial. He harped endlessly on the various shooting classes Hickey had completed. … like a broken record, the prosecutor asked each expert and material witness about each class Hickey had completed, what it covered, challenging why a private citizen would need that knowledge…
We knew they were going to bring it up, but it actually helped us out