Originally Posted by JMM

I have done it twice. Both times it worked. An old friend who is an LAPD motorcycle cop taught me this.

You have a right to mount a defense, even for something as simple as a speeding ticket.

You get the court to assist you (they are required by law to do so) in getting a subpoena for the manufacturer of the radar gun. In the subpoena, you ask for the specifications of the particular radar gun used. The company will refuse, trade secrets. Case dismissed.