Had radar detector on & working all the way from Houston. Got to Palmer area on I45. Came down slight decline around a slight curve to the right & then went under an overpass. A Palmer cop hit me with a laser from above up on the right side of the overpass as I was rounding the curve down towards the overpass he was parked above. My radar detector NEVER caught it. His car was parked up high on the overpass shoulder above the traffic with the front aimed down on top of the northbound I45 traffic. There is no way a radar detector can pick this up or laser jammer can defeat it because he gets any light colored vehicle from above. My vehicle is a white pickup.