Weird post maybe? I don't know.
I was in a rougher part of town getting some tires for my car. While leaving, drove by this guy and snapped a quick pic for the heck of it...then thought "why is this guy carrying open?" Didn't seem like a cop, but I just had a few seconds to check it out. Just really stood out. Haven't seen any plain clothes cops, but usually don't hang out where they would patrol.
I still sport my military haircut and I get lots of looks when I'm in parts of town I don't belong, they probably assume that I AM an undercover cop.