Given what you presented, I do not see this as a probable cause issue. For instance, he may have come to get your version and that is when he discovered you were intoxicated. However, you need an attorney to go over all of the facts.
I think there is nearly always a chance to beat a case. I think the chances depend upon a few things. Here, whether you were charged with underage drinking or DUI under 21. It also depends upon what exactly you said to the officer. Do not share anymore online and hire and attorney to assist you.
Given what you have presented, I do need see a successful suppression motion. HOWEVER, there is a lot more to this and there may be other ways in which he violated your rights. I full review needs to be done.
Much more would need to be known. What we call a "Motion to quash" may be in order. This basically tells the Court of Common Pleas that the Municipal Court made an error in holding it for trial. Once the transcripts are ready, they can be read and determined if such a motion is appropriate.
Michael L. Doyle
Miranda only applies when both a person is in custody and is being interrogated. It seems that neither situation existed, although you can argue that asking for the password was interrogation. There may be many issues with her case, but at this point I do not see that as a strong argument. Contact an attorney ASAP to assist in this matter.
Any one that is over ten years old is not considered when determining what number DUI it is for purposes of grading. However, they will be considered at time of sentencing. Any time a person has multiple DUIs there is a very good chance this person is a problem drinker. The Judge will probably be concerned that this person is still drinking.