I captured this yesterday driving eastbound between Elko and Wells, Nevada - basically in the middle of nowhere. The Redline started alerting to a K-band source. At first I thought this was a Cobra, but after passing the few vehicles in my area, I never figured this one out. It alerted for about 10 miles, very low level. I eventually unplugged the unit, plugged it back in - K-band alert went away. Weird.
NHP uses Ka band, so highly unlikely a LEO.
Location: Google Maps - Wells, Nevada
[ame=http://www.youtube.com/watch?v=7QNoSDeOKiA]YouTube - Strange K-band alert[/ame]