People v. Crant

The defendant is accused of violating a local ordinance prescribing a vehicular speed limit of 25 miles per hour. Upon the trial, the prosecuting officer testified in substance that he followed the defendant’s vehicle in a police car and noted that his own speedometer read 42 miles per hour, while a constant distance was maintained between the two cars.

Proof of speeding, based solely upon the reading of an untested speedometer has been held to be legally insufficient (People v. Hey ser, 2 N Y 2d 390). To establish the accuracy of the speedometer, the People offered in evidence a card…