I've known several.
They tended to be older, more street-smart. They all supported self-defense.
I knew one old timer, who carried a Colt Gold Cup, cocked n' locked, who told me, "I don't care what kind of guns anyone has, so long as they aren't shooting them at me it's none of my business."
Another told me he had no problem with Concealed Weapons. "Folks carry anyway, good or bad. At least this way the good guys have a way of carrying without getting hassled."
I bought my first handgun -- a S&W 645 -- from a cop (when I was 19 years old!!! Probably not as big a deal in those days, but still...)
Firearm Instructors tend to be universally pro-gun, in my experience. At least all the Instructors I've had were. I had the pleasure of knowing a couple real-life CSI guys, who were very pro gun ("Those victims wouldn't have been victims if they'd been able to shoot back!"). They also had wonderfully dark sense of humor, which is another topic altogether....
And then there was the guy who first taught me how to shoot, how to handle firearms -- my father, a retired Deputy Sheriff. I grew up with loaded guns in the house, and the respect that goes along with them. Dad encouraged me to pursue firearms as an interest, regardless of whether I went into LE myself or not. He carried his .38 Model 60 (first generation!) right up until he passed away (It's a good thing I retired it to the safe... the ammo in his dump pouch was starting to turn green...
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