Well that's very odd. I am assuming when you mean 11-502 (which is the statute that should be listed on the ticket). The reason it is odd is because the law requires the original seal to be broken in order for the ticket to be given.
(The law allows for alcohol to be contained in the passenger compartment of a car so long as the original seal is still intact). This is the law regardless of whether it is regular car or if it is a pick up with no truck.
Nonetheless, both the transportation ticket and the speeding ticket are eligible for Court Supervision. Court Supervision is a type of deferred prosecution where if you complete certain requirements imposed on you by the Court (i.e., payment of all fines/fees, community service if required, traffic safety school, etc), the tickets will be dismissed. This is important because if the tickets are dismissed, no formal conviction is entered against you and your criminal history remain clear.
On top of that, both tickets are petty offenses. Petty offenses are offenses that are not criminal and do not lead to jail time if convicted, but they are only punishable by a fine. (it must be noted that, however, for someone who is under 21, two or more open alcohol container tickets will lead to license suspension).
So, essentially, the possible outcome for your tickets are fine only and no jail time. That being said, it would be wise to retain an attorney to take a closer look at the evidence as, based on what you have provided, the alcohol transportation ticket may lead to a finding of Not Guilty since the original seal was not broken. Also (depending on which county this is in), prosecutors and judges may take a tougher stance on someone under 21 when there is any type of alcohol related motor vehicle operation. An attorney may be able to level the playfield and lead the matter to a more favorable outcome.
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