I found PDF that simplified it. But yeah if he was in motion and he states that the radar showed him 51 then i was not going 51 because he would have to minus his speed as in the PDF example if a car was moving away from a police car and showed 20MPH and the police was going 50MPH then the actual speed would be 70MPH.
Now the next thing is will he be honest and state he pinged me almost a block away and while he was moving toward me. Then its's all if teh judge can see the error or ignores it.

