The radar

An off-duty police officer, familiar with radar guns, drove through a school zone within the legal speed limit when the flash of a camera went off, taking a picture of his license plate.The officer, thinking the radar was in error, drove by again;even more slowly.  Another flash.  He did it again for a third time, at an even slower speed.  Same result."This guy must have screwed up the settings,"the off-duty officer thought. A few weeks later, when he received the violations in the mail,he discovered three traffic tickets:Each for not wearing a seat belt!