A very sleazy Prince William cop tailed me on my blind spot while I did the exact speed limit. Just we approached the Independent Hill Drive intersection, the light went from green to red with orange lasting about 1 second. At my distance from the light I had to stand on the brakes to keep from running through it. He then rode my bumper for about a half mile until we passed by a Virginia State trooper speed trap on the side of the rode, after which mister sleaze exited the highway. I believe the cop controlled the light change-over to try to entrap me on a red light moving violation.