Generally cops in my area use ka, I say generally because about a week ago I did drive by one county sheriff in an SUV and picked up k-band, but every other police vehicle that registers something gives me ka.
So it came as a shock today when I got my first laser alert. I had crested and was starting down the last hill into town when it sounded. The airport was too far away and off to the wrong side, there were no street lights or signs, I take this hill all the time and have NEVER picked it up there before, and the sun was in the wrong part of the sky (I was driving up into it coming up the backside of the hill, but at this point it was above and to the side).
I mount my RD up high, just below the ceramic dots at the top of my windshield, but I drive a low car and being I was coming down a hill any laser would have to have been shot up at me.
Surprised me though, I didn't think we had laser in the area. I turned around and came back through trying to find it but it's an industrial area and they could easily have hidden anywhere (or unmarked) and I never would have found them.
Anyway, I was doing a bit over (having just crested a hill) but stomped on the brakes right away and didn't get pulled over, so I got lucky this time I guess.
Our area just got a new batch of police vehicles, I guess they're outfitting them. I've seen HP in the area using laser from an offramp but didn't think the city cops had it yet. I'll have to really stay on my toes now.