what stick-em said ... just be ready if they are inflexible.
not sure how the testimony of when he left would convince the judge his speed was less than the cop indicated ...
whatever happens do get him in driving school ... anyone who has a teen driver. protect them from more than a speeding ticket!
here is where my kids went and i think there are similar locations nationwide
http://www.charlottemotorspeedway.co...riving_school/
good luck