In this particular type of defense. ok.<quoted text>
Your own post;
A successful prima facie defense is rare. Not only does the burden of
proof rest upon the accused, a successful defense may involve
expenses well in excess of the cost of a ticket, such as an expert
witness. Furthermore, because prima facie defenses must be presented
in a court, such a defense is difficult for out of town motorists
But don't you think the radar reading would be the state's evidence?