There is usually a printout from the radar gun after each stop. That and history is recorded within the radar gun. Look on your ticket, it says the date and time. What the court can and will do will have a history of every "shot" the gun had made on the given day and look at the time frame on your ticket. If there is no 74 then it never happened.
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"so persuasively did they talk; and yet there is hardly a word of truth in what they have said."
Plato, Apology
"On life's journey faith is nourishment, virtuous deeds are a shelter, wisdom is the light by day and right mindfulness is the protection by night. If a man lives a pure life, nothing can destroy him."
Buddha