Lie detectors

"It had been a long day in traffic court, and the judge was listening to the final case on the docket.
The police officer stated that he had observed the defendant traveling significantly above the posted speed limit. In response, the defendant went on and on about the road conditions, the amount of traffic and his innocence.
Then, certain he had won his case, he melodramatically proclaimed, "Why, your Honor, I'll even take a lie detector test."
"Son," the judge wearily replied, "I am the lie detector." —